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I bought an Acer a500 tablet a few days ago not knowing how broken it is.
After loads of research and attempting different techniques I still haven't had any progress.
The software issue:
When booting up the tablet, it goes to the black screen with "android system" at the top and power off/ shutting down in the middle of the screen.
Fixes I've tried:
1.
Since I don't know anything about what operating system is on this tablet, I have been blindly flashing different "stock" (from Vache) versions of HC.
--The android logo with gears shows up, the green bar loads but freezes when it gets 1 cm away from finishing.
--After turning off the tablet and booting it up again, "updating bootloader shows up on the upper left hand corner of the screen. Then a message pops up saying "apk installer: all pre processes complete". Then it returns to the black screen.
2.
The tablet will not go into apx mode (using the reset botton at the bottom).---Fixed. I didn't execute the steps properly. Apx mode works fine.
3.
I plugged the tablet into an older windows laptop and the computer could not install the correct drivers to sync with the tablet. Again also my lack of knowledge. I installed drivers from Acer.com
4.
These two guides seem to be exactly what my problem is but I can't seem to make sense of them:
http://forum.xda-developers.com/showthread.php?p=24531880#post24531880
http://forum.xda-developers.com/showthread.php?t=1572622
This is as far as I've gotten.
Other complications:
--The battery is dead. I have to use it while plugged in by the charger.
--Most of the thread that I have looked at use Megaupload as the source of downloading their files.
--The original owner of the tablet will not help me out. As I stated before, I don't know what version android OS was on here before it was bricked and on top of that the original owner won't answer my questions. As far as I know though, this tablet is not rooted or has anything "non-OEM" installed in it. The story goes that this tablet was bricked when the owner tried to "update" it. Before that, it was functioning perfectly.
-----It looks like Darvis is having the same issue and frustrations I'm having but reading his threads makes me think that this tablet is a dead end.
http://forum.xda-developers.com/showthread.php?t=1427983&page=4
http://www.androidtablets.net/forum...32467-please-help-me-unbrick-my-iconia-5.html
If someone could point me in the right direction toward fixing this tablet, I would appreciate it very much.
Thank you for reading my Thread.
KiwiN said:
http://forum.xda-developers.com/showthread.php?t=1572622
Click to expand...
Click to collapse
First off......I hope u didn't pay much for the tablet.
Secondly the guide above looks pretty straight forward but maybe this is one of the ones that has files at megaupload?
I know that the ra recovery and timmydean's files are accessible as I have downloaded both of them.
Maybe someone who has done this previously will chime in and get you the other file if it is indeed unreachable.
Sent from my A500 using xda premium
I would suggest trying to connect the tab to a Windows 7 PC after installing the USB drivers from ACER. Then check if your device appears in the device manager. As long as you have its UID you can flash the tab from the PC with one of the EUU tools - check my signature on "how to revert to 3.0.1" or TimmyDean's thread which offers an EUU with rooted HC 3.2.1 (it's linked in my thread as well).
How exactly did you try to get into APX mode?
p.s. I have the EUU files if you can't access them from the threads links. I can send them to you.
getting into apx mode
When I perform the steps (hold reset + power for 3 secs then release power); the tablet turns on as it usually does. It goes to the Acer screen, then android and back to the black home screen. My computer responds by saying that it is "installing drivers" but it "fails to install drivers". At the same time I have the DND.exe open and it does not recognize my tablet.
I'm trying to follow the instructions from the root 3.2.1 v4 file.
I can't perform the first step where it instructs me to turn on Usb debugging. The problem is that I can't open the settings by clicking the clock. Nothing happens.
I realize that one complication of my tab is that it will not charge. The battery power is below 15% so none of these fixes might not be effective for me. That might be the ultimate problem?
CyaN1de-
I paid $100 for the tablet. As of this moment I feel like I paid too much.
Thank you both for you quick replies. I have to say that most of the problems that I'm having is because of my lack of experience but I'm learning. I hope I fix this tab soon.
if this dont fix it, i'll give you what you paid for it;0
someone posted a while back that a hard reset fixed the android systems screen error
not sure where you're at now but no harm in trying it
Try using hard reset:
1) Turn off your tablet,
2) Rotation lock s to your left;
3) Press Vol+ (which is next to rotation lock) and power on simultaneously
4) As soon as the tablet vibrates you can release the power on button and you
should start to switch rotation lock left and right till you see
Erasing Userdata...
Erasing Cache...
Vol+ is still pressed;
5) The tablet starts to format
6) Your tablet will be as clean as it can be.
Thanks for the suggestion but I didn't accomplish anything by hard resetting it. I've done this many times and nothing has changed.
I haven't given up on unbricking this tablet yet and even though it's frustrating I'm learning from the process. If I decide to sell it, I'll contact you Dibb.
KiwiN said:
.....
When I perform the steps (hold reset + power for 3 secs then release power); the tablet turns on as it usually does. It goes to the Acer screen, then android and back to the black home screen. My computer responds by saying that it is "installing drivers" but it "fails to install drivers". At the same time I have the DND.exe open and it does not recognize my tablet.
Click to expand...
Click to collapse
i've seen the 2 methods u described but i've not seen anyone else have success with it apart from the OP'ers - seems OTT to me but hey if it works for ya...
I've used timmydeans method ALOT on HC it never failed to work and that includes reverting back to HC from ICS - if it doesnt work for your issue then id be tempted to use blackthund3rs APXFlash Tool and civato's HC_ICS_Bootloader zip to flash a new bootloader and rom package on yr tab - but for the moment we'll run with td'sv4 - if drivers fail to install then believe me, its a good sign
try this:
I know you-ve probly done it but u need to do it again:
reboot everything, then reinstall acer drivers (yeh i know)
fire up ya tab but dont connect to yr pc just yet -as you said you
doubt usb debugging in enabled so we'll try another way around it
run the prgb20.exe it will scan for the new image but not find it becos youre disconnected...thats good....
after maybe 5 -7 minutes of scanning for the new image - it will show a
window "cannot detect yr iconia tab"
and instructions for getting into apx mode - go ahead connect usb put the tab into apx BUT don't click next until....
the drivers will try to install, dont let windows search but let me choose
(off memory) choose device and adb or android ph should show up here
the acer boot/recovery drivers should install...maybe even under USB Controllers
once they do and only when they do click next to put tab into:
acer download mode.......
as i said this is worth a go,,,,how about the update.zip have u tried that.....
else the only other way i know is apx flash....ya still need to get into apx
mode and if u cant then ???? sometimes youll try something over and over
and then out of the blue it will work...you'll swear you never did anything different , it jsut worked this time.....
hope you find some joy
Thanks Dibb for your words of wisdom. I've put it aside for now but I'm going to pick it up in the morning.
As addition to what dibb_nz said - Windows 7 would do the trick - I'm almost 100% sure you'll be able to connect in APX mode with the drivers properly installed. Then use one of the EUUs.
Drained battery really looks like the ultimate problem now because as far as I know you cannot charge the tab in APX mode - haven't tried that. Eventually I would suggest to crack the tab open, remove the battery and charge it somewhere - I don't know alternative ways but...may be another tab or you own charger with proper connector ...
http://www.youtube.com/watch?v=xvXihNIdQ1M
p.s. 15% power ... seems enough to flash through the PC...but who knows - don't waste them and get everything you need before starting the procedure.
no probs m8 hope u have better luck tomorrow
if u wanted to try the EC method i have those files if you want them
good luck m8
dibb_nz said:
if drivers fail to install then believe me, its a good sign
try this:
I know you-ve probly done it but u need to do it again:
reboot everything, then reinstall acer drivers (yeh i know)
fire up ya tab but dont connect to yr pc just yet -as you said you
doubt usb debugging in enabled so we'll try another way around it
run the prgb20.exe it will scan for the new image but not find it becos youre disconnected...thats good....
after maybe 5 -7 minutes of scanning for the new image - it will show a
window "cannot detect yr iconia tab"
and instructions for getting into apx mode - go ahead connect usb put the tab into apx BUT don't click next until....
the drivers will try to install, dont let windows search but let me choose
(off memory) choose device and adb or android ph should show up here
the acer boot/recovery drivers should install...maybe even under USB Controllers
once they do and only when they do click next to put tab into:
acer download mode.......
hope you find some joy
Click to expand...
Click to collapse
So I went through all these steps and the TD's V4 tool finishes updating the tab. But then it continues to the same black, android systems screen. And afterwards the tablet won't connect with the computer.
I am currently downloading the update.zip so i'm going to see if that will work.
KiwiN said:
So I went through all these steps and the TD's V4 tool finishes updating the tab. But then it continues to the same black, android systems screen. And afterwards the tablet won't connect with the computer.
I am currently downloading the update.zip so i'm going to see if that will work.
Click to expand...
Click to collapse
do u get on yr tab the big 'PASS' in white leetters or "entering download mode" at all???
think we're beyond update.zip if EUU failed but you can try it -
you can get to apx which is a start - getting a new boot/recovery image on there is the main priority I think...as i posted earlier i've only ever seen a fix for this problem work for 2 people, so on new ground here....
But anyway check out the APXFlash method/walkthru in my sig....all the info is in there and the links to the required files ....do we know if you're on HC or ICS B/L????
I got the word pass; now using recovery mode to flash a rom.
not sure which bootloader I have.
I am using:
Acer_A500_7.006.01_COM_GEN2: http://vacheandroid.com/files/Acer_...1_COM_GEN2.zip
But after it says install from sdcard complete it also give me the message:
E: Can't mount/ dev/block/mm....
E: Can't mount Cache: recovery/log
E: can't mount open cache: recovery/log
E: Can't mount /dev/block/mm...
found this:
dibb_nz said:
yes if you're talking about the stock roms from vaches thread, you need the full rom package - you cant just use an 'update' package as they need a full rom to work properly....
for instance my original HC3.2.1 Stock build is 7.014.15_COM_GEN1
and theres no FULL Rom for 3.2.1, so i have to use the HC 3.2 FULL instead
.....Acer_A500_7.006.03_COM_GEN1.zip
Once flashed, thankfully I recieve the 2 small OTA Updates to get up to 3.2.1 again
Another couple of days the ICS OTA d/l'ed and installed with no probs....
is that clearer or am i making things worse????
Click to expand...
Click to collapse
What I've learned from this whole process is that all of the obstacles I'm facing are due to my lack of knowledge. Thanks for sticking with me Dibb. I can't thank you enough.
KiwiN said:
When I perform the steps (hold reset + power for 3 secs then release power); the tablet turns on as it usually does. It goes to the Acer screen, then android and back to the black home screen.
Click to expand...
Click to collapse
I could never get mine into apx mode with the usb cable plugged in. So try that if you haven't. And it is literally hold reset, then press power, without letting up on the reset, release the power button after 3 seconds (use a watch or timer!) then one more second before you release the reset... It does work, but the timing has to be close. It must have a tenth of seconds or less tolerance. Very picky... I've done it on 2 different a500s so far and I am heading to do another tonight. If it doesn't work I'll be right back!!!
KiwiN said:
I got the word pass; now using recovery mode to flash a rom.
not sure which bootloader I have.
I am using:
Acer_A500_7.006.01_COM_GEN2: http://vacheandroid.com/files/Acer_...1_COM_GEN2.zip
But after it says install from sdcard complete it also give me the message:
E: Can't mount/ dev/block/mm....
E: Can't mount Cache: recovery/log
E: can't mount open cache: recovery/log
E: Can't mount /dev/block/mm...
found this:
What I've learned from this whole process is that all of the obstacles I'm facing are due to my lack of knowledge. Thanks for sticking with me Dibb. I can't thank you enough.
Click to expand...
Click to collapse
Hi m8 Hwya goin - just got home - what's the lay of the land???
Holey motley we just had a good shake....thort was gonna carry on thank fk it stooped, phew, just been awhile since we had one like that, scary
Crikey just as I finished typing "....land"
Back to more important matters..... whr u at m8????
None of the roms I've tried to flash go to completion. I'm stuck at trying to flash different roms from recovery mode. Not much luck with what I've tried but I'm going to try more before I give up.
Are there any particular roms I should try more than once?
Or why am I getting the "error" messages stated earlier?
KiwiN said:
None of the roms I've tried to flash go to completion. I'm stuck at trying to flash different roms from recovery mode. Not much luck with what I've tried but I'm going to try more before I give up.
Are there any particular roms I should try more than once?
Or why am I getting the "error" messages stated earlier?
Click to expand...
Click to collapse
recovery mode???
u need a new boot and recovery image on that thing
the HC EUU based flash arent working even tho u got a PASS on screen after TDv4
So HC based methods arent up to it. You need nvflash/fastboot.
We need ICS with the unlocked bootloader it has access to another level below where HC worked because HC b/l is and always has been locked down.
If ICS cant fix it, I have no idea what will and my offer to buy is off the table!!!!
check out civatos guide and ready yourself for nvflash via zip files in that post or blackthund3rs APXflash tool, with a complete tutorial for using it, all links in my sig.
good luck
Just to chime in with a tip on getting google drivers to work.
When getting any device not recognized, or driver error, generally I go into windows device manager, select the unknown or offending device, update driver, only I choose which driver to use, and ignore the error message where it says "may not be compatible with your device", and use it anyhow.
I get that occassionally when swapping back and forth between devices.
Also, battery not charging and display errors, are usually a sign of EC Power control. So you were on the right track about that. Once you get a rom up and running, if the batt don't charge, then there are some EC flash's you can do from CWM.
Back at it again using BT's nvflash tool. And tablet is still bricked.
I've tried a few different bundles and none allow me to operate the tablet. Everything goes smoothly and I get "pass" at the end of the process. When I go to reboot the tablet, it gets stuck at the black start up screen.
Found another lead: http://forum.xda-developers.com/showthread.php?t=1579490
Sounds like he was in the same situation as I am but has a bit more skills and knowledge dealing with problem solving.
You say you were able to flash roms. So apparently recovery is working OK. Have you tried flashing civato's flexreaper? It has code that will detect whether you bootloader is HC or ICS. You may just be flashing a rom that doesn't match your bootloader... I know I'm jumping into the middle of this, but it's just a thought.
Also, when you did the hardware reset with the rotation lock switch did you get the confirmation that it was, in fact, being wiped?
Failing all that, I'd be willing to take it off your hands for spare parts...
Sent from my A500 using Tapatalk 2
Hi
2 day ago my girlfriend was left tegra note at night, In morning I was put it to charger.
I was turn on and stuck on boot logo - NVidia circle is running around non stop and dry battery.
I run recovery mode and try choose any option but nothing is going to next step.
How can I recover her tablet and try do not delete her data?
Please help!!! I new in android, I don't have any problem with flashing and etc.
Done with Symbian, windows phone and ios but that is my first time with android.
Best regars
REVIVE
You can try to use the toolkit in this link http://forum.xda-developers.com/showthread.php?t=2627654. If that doesn't work you'll have to RMA it for a replacement.
perez6991 said:
You can try to use the toolkit in this link http://forum.xda-developers.com/showthread.php?t=2627654. If that doesn't work you'll have to RMA it for a replacement.
Click to expand...
Click to collapse
I read that already, but I cant turn on noting in tablet because is stuck, is any software for windows for flash tablet like that?
I run bootloader but recovery kernel option saying no command.
@MikeChannon removed OP. please close
what? lol
Yeeha! You are the magic man....
workdowg said:
Yeeha! You are the magic man....
Click to expand...
Click to collapse
He truly IS the man. Helped me out BIG style.
ionioni said:
READ CAREFULLY AND BE WARNED BEFORE ANYTHING:
THIS CAN HARD-BRICK YOUR DEVICE AND I TAKE NO RESPONSIBILITY FOR THAT!
use it only if you must or not at all
you can read this for some details about what bricks are so you understand what you can get into
this is for all Yoga Tab 2 models 830, 1050, 1380 (regardless of the submodel F,L,LC)
it restores(downgrades) your bios firmware from whatever Lollipop version to the original/genuine one from the latest KitKat stock rom released by Lenovo (and all the latest KitKat stock rom's have 150422 in the rom filename, ie April 15, 2015 and nothing not even minor OTA's were released after this date for KitKat, next ones upgraded KitKat to Lollipop)
useful to:
1. those who want to return back to the KitKat stock rom from Lollipop (if you simply flash back the KitKat stock rom files and you are still on Lollipop bios firmware you will softbrick as the Lollipop bios is a x64 version while the KitKat loader/kernel are ia32 so you will get stuck at efi shells, bios screen etc)
2. those who took the Lollipop OTA, succeded, but had in time problems (bricked their device) and cannot flash a Lollipop stock rom as they don't have one (not being released by Lenovo/available yet and at least some 830 and 1380 models are in this situation), so they must flash back KitKat stock rom and after take the OTA to Lollipop (and the KitKat flashing part put's them in the same situation as those from p1.)
3. those who tried to take the Lollipop OTA and had problems and they tried to flash KitKat stock rom and yet they are failing (this could be due to problems in the updating while OTA was applied, yet could be that their bios firmware was updated to Lollipop version)
4. those who want to test stuff (going down/up between versions) ... you name it...
how to use it:
1. first download and extract the corresponding tool for your device (830 and 1050 models share the same bios firmware so they have a common tool), while at this you can watch the little attached recording i made with the tool restoring the bios for my 1380F tab so you know what to expect when you run it. USE THE TOOL THAT MATCHES/CORRESPONDS TO YOUR MODEL, you can hard-brick if for eg you use the 1380 one on a 1050 model (didn't even tried but nothing good can happen)
2. place your tab in the DnX mode: power off (by force if you have to), press and hold both VolUp and VolDown butons, keep them pressed, now press Pwr to start and release Pwr when it turns on/buzz (but keep holding pressed Vol buttons), in a few seconds your screen will display "Fastboot starting..." and it will hold on that, now you can release the Vols (you are in DnX mode). you must get that message, try again the whole sequence until you succed, don't move on until you have that "Fastboot starting..." on your screen.
3. run the tool (you must have the intel drivers installed, if you flashed to your tab at some point you should have them already), follow the messages i think it's quite easy and straightforward, in a few minutes you will be done and having a brand new kKitKat bios firmware on your tab
(3) if while running it hangs on the "Preparing to push files..." message, and your tab starts to the whatever error message you had before it means that you already have a KitKat bios (the tool works only with the Lollipop bios firmware) so you don't need to restore the bios, you can flash stock KitKat rom directly (in this scenario the tool doesn't modify anything on your tab)
4. when it finishes the tool will automatically reboot your tablet, leave it for a few seconds to start (it will most likely go ninto some efi shell, or bios screen whatever your old files were) afterwards turn it off (long press Pwr) and that's it
5. you can now start in DnX mode again and flash your stock KitKat rom (this step is quite known by now so i won't detail it, there's a lot of info on that in other threads), take OTA's, eat candies... whatever you like
i must warn you again, while i tested this tool (i think i moved from KitKat to Lollipop and back at least 20 times and never had any issue with it) you are the only responsible if something bad could happen, this is playing with bios (and any mistake will hard-brick your tab so you will have to send it to a service for fixing). make sure you have enough battery (while i used the tool even when i was with 5% on my battery i would not recommend, i say at least a 30-40%, the process runs only for 2-3 minutes so that should not be an issue). and of course once it started the flashing DO NOT EVEN THINK OF INTERRUPTING! (you could close other software on your PC that maybe can hang your computer while flashing.. you got the point)
Good Luck!
edit: i already have messages about successful bios restoring (as expected no? ) but failing on completing the OTA to Lollipop update after flashing anew the KitKat stock rom. to them and to all of you people who are going to Lollipop from your newly flashed stock KitKat: SET YOUR COUNTRY CODE!!! after you flash back stock kitkaton the first boot input ####6020# in your contacts and a dialog will pop from which you MUST choose a country (no matter which one, preferably yours or a close one), then after the tab reboots for updating the region and comes back to Android check that you have a country code set by entering #### 59930# and it should show the code you chosed. if you take the OTA without a country set you will FAIL! if you failed on your OTA to Lollipop flash anew the stock KitKat rom and set the country code
also do not take an OTA if your device is rooted, always UNROOT first then take the update, and you can root back after or just don't root until you finished the whole Android installing and OTA updates
Click to expand...
Click to collapse
thank you! i had the boot to bios problem after trying some not-smart things. after spending an hour on the phone with lenovo this morning getting a repair authorization, i printed out the label. i don't need to send in my 1380f now.
your app fixed that and i was able to flash to kitkat and then upgrade to lollipop.
Works perfect! Thanks!
daWyrd1 said:
thank you! i had the boot to bios problem after trying some not-smart things. after spending an hour on the phone with lenovo this morning getting a repair authorization, i printed out the label. i don't need to send in my 1380f now.
your app fixed that and i was able to flash to kitkat and then upgrade to lollipop.
Click to expand...
Click to collapse
yeah... the guys at Lenovo deserve a break, they have such a beautiful daadeedaadoo sound on the boot animation (that one cannot even disable it )
bisti2004 said:
Works perfect! Thanks!
Click to expand...
Click to collapse
Pentru putin
Mersi Dorin!
My 1050F cannot boot for long time, I posted the problem(http://forum.xda-developers.com/thinkpad-tablet/general/help-1050f-dead-t3188696) but no one answered me. Today I was very excited to find this post and read it carefully, then tried to do it. But just after the sending progress started (the "xx%" progress began)for about 10 seconds, the program "restore-kitkat-bios-830_1050" vanished(Maybe forced teminated by Windows? I ran the "restore-kitkat-bios-830_1050" after a new reboot of Windows). I waited for about 3 minutes, the "restore-kitkat-bios-830_1050" program still didn't appear, and the tab hanging on a normal picture ( I don't remember, probably a recovery stage picture? but I remember the last line is "the result is Okay"). So I had to disconnct the tab from the computer, and powered it off. Then I try to power it on, but sadly find it cannot boot to any screen. In a dark room, I find the backlight of the tab is on when I pressed the power button, but there is no text or picture on it, regardless of whether I press the power button independently, or press the power button together with any volume button(s).
Now the tablet seemingly has changed into a REAL brick (or hardware brick?). How can I rescue it? The only way is to send it to a service?
aerofisher said:
My 1050F cannot boot for long time, I posted the problem(http://forum.xda-developers.com/thinkpad-tablet/general/help-1050f-dead-t3188696) but no one answered me. Today I was very excited to find this post and read it carefully, then tried to do it. But just after the sending progress started (the "xx%" progress began)for about 10 seconds, the program "restore-kitkat-bios-830_1050" vanished(Maybe forced teminated by Windows? I ran the "restore-kitkat-bios-830_1050" after a new reboot of Windows). I waited for about 3 minutes, the "restore-kitkat-bios-830_1050" program still didn't appear, and the tab hanging on a normal picture ( I don't remember, probably a recovery stage picture? but I remember the last line is "the result is Okay"). So I had to disconnct the tab from the computer, and powered it off. Then I try to power it on, but sadly find it cannot boot to any screen. In a dark room, I find the backlight of the tab is on when I pressed the power button, but there is no text or picture on it, regardless of whether I press the power button independently, or press the power button together with any volume button(s).
Now the tablet seemingly has changed into a REAL brick (or hardware brick?). How can I rescue it? The only way is to send it to a service?
Click to expand...
Click to collapse
i've seen the post with the problem you had, now the thing is on a "normal" bricked tablet (meaning soft bricked one) your tab never hangs at the screen to which you're referring to (Powered by Android) it will always move on (to some error message, bios etc). the same tool was used by me and others (including for your 1050F model last one I recall is @Einwood) and never had issues (until now) so imo it's very unlikely that the problem was from the tool (it's task is quite simple and don;t see what could go wrong) something interrupted the flashing process. also you said you tried both lollipop and kiktkat rom flashing and failed and at least one of them should have worked (the roms are flashed using bios dnx as start) so the issues are with your tab hardware most likely.
but all that is irrelevant now... if it doesn't boot at all and you cannot get it to show ANY message at all (white Lenovo logo doesn't show up when you power on nor does it buzz when pwr on) then service is the only solution
@ The Others: please post your tab model too when posting
Thank you so much for such detailed analysis, but I cannot figure out why the hardware has problem. Yes, now it cannot show ANYTHING, white Lenovo logo doesn't show up nor does it buzz when pwr on. Anyway, I think I have no choice except the official repairment now.
I'm trying to find the LENOVO service sites in Canada, but their Canada official site has no such information, on the contrast, its website is full of sale/order/payment information. I think I should re-think about this company.
Thank you again for the reply.
ionioni said:
i've seen the post with the problem you had, now the thing is on a "normal" bricked tablet (meaning soft bricked one) your tab never hangs at the screen to which you're referring to (Powered by Android) it will always move on (to some error message, bios etc). the same tool was used by me and others (including for your 1050F model last one I recall is @Einwood) and never had issues (until now) so imo it's very unlikely that the problem was from the tool (it's task is quite simple and don;t see what could go wrong) something interrupted the flashing process. also you said you tried both lollipop and kiktkat rom flashing and failed and at least one of them should have worked (the roms are flashed using bios dnx as start) so the issues are with your tab hardware most likely.
but all that is irrelevant now... if it doesn't boot at all and you cannot get it to show ANY message at all (white Lenovo logo doesn't show up when you power on nor does it buzz when pwr on) then service is the only solution
@ The Others: please post your tab model too when posting
Click to expand...
Click to collapse
aerofisher said:
Thank you so much for such detailed analysis, but I cannot figure out why the hardware has problem. Yes, now it cannot show ANYTHING, white Lenovo logo doesn't show up nor does it buzz when pwr on. Anyway, I think I have no choice except the official repairment now.
I'm trying to find the LENOVO service sites in Canada, but their Canada official site has no such information, on the contrast, its website is full of sale/order/payment information. I think I should re-think about this company.
Thank you again for the reply.
Click to expand...
Click to collapse
sorry about your issue, yet repairing should not take long, maybe @workdowg can guide you more as it had a similar problem and was solved very fast (6 days if i recall) sending through fedex on lenovo's expenses.
aerofisher said:
Thank you so much for such detailed analysis, but I cannot figure out why the hardware has problem. Yes, now it cannot show ANYTHING, white Lenovo logo doesn't show up nor does it buzz when pwr on. Anyway, I think I have no choice except the official repairment now.
I'm trying to find the LENOVO service sites in Canada, but their Canada official site has no such information, on the contrast, its website is full of sale/order/payment information. I think I should re-think about this company.
Thank you again for the reply.
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http://bfy.tw/2gNc (just having fun) it is the one that says phone support.
ionioni said:
sorry about your issue, yet repairing should not take long, maybe @workdowg can guide you more as it had a similar problem and was solved very fast (6 days if i recall) sending through fedex on lenovo's expenses.
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Yes, once i talked to them (about 5 minutes) they emailed me all i needed and i just had to find a local fedex dropoff center. They boxed it and i got it back in 6 days.... this seems to be a common thing for them....
Sent from my YOGA Tablet 2-1050F using Tapatalk
Yoga Tab 2 (830, 1050, 1380) - get back to KitKat
You are my lifesaver and I just can not thank you enough @ionioni
how can you make a file like restore-kitkat-bios-1380.zip ??!! you are such a genius !! :good:
We will never be able to flash it back to KitKat Bios without this zip file !! :crying:
But why don't we need to flash it back to Kitkat Bios on my Samsung Note 3, S5, Note 10.1 (2014 version) and Nexus 9 ?!!
thank you very much for your hard work again and keep up the good work pls
this was on my inbox and it should continue publicly maybe others can benefit
KainXSS said:
I'm wondering what your flashing to the tablet with your tool, I have a Lenovo S8-50F and lollipop is pretty abysmal on it, so I'm wondering what your flashing to downgrade the bios so I can try it on the S8, since its very very similar to the 830.
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you should NOT use the tool unless it is made exactly for your model, or you most likely will hard-brick. moreover Lenovo uses an in-cpu module for digitally checking the authenticity of the firmware you have on your board at pwr on time and even if you have a bios that would work on your model if it is signed with another key it will cause a hard-brick (the measured boot module will refuse to load the IBB in the new bios).
for eg if one writes the 1051 windows variant of bios on the 1050 android one (they are identical in hardware) it hard-bricks (tested).
send me a link to the latest KK stock rom for your device and i will check on it.
That is what happend to me. My loved 1380f is hard-bricked. Only the white lamp is blinking and it doesn't turn on anymore.
Is there a possibility to repair it or can i throw it in the garbage? Please give me an advice. Thank you very much.
bombolota1 said:
That is what happend to me. My loved 1380f is hard-bricked. Only the white lamp is blinking and it doesn't turn on anymore.
Is there a possibility to repair it or can i throw it in the garbage? Please give me an advice. Thank you very much.
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not so much you can do, the hardware is fine, it just got the wrong firmware in it... somehow you must rewrite the bios but you cannot do that from the outside (ie by software means) without being able to boot at least in DnX mode. you can check quickly ... if after you PwrOn (well.. after you long press Pwr button as at this moment Powered On of Off are werid concepts ) you don't get NOTHING on your display (ye not even the Lenovo -> Powered by Android white/black logo) than that's it (try maybe to see if somehow DnX didn't got hooked by entering a fastboot devices and see if by some miraccle you don't see your device there)
your device must be opened by a repairing service tech (especially if he is on warranty), you could do it yourself (i did) but you need the appropiate tools and know/how otherwise from a hard-bricked yet recoverable (the hardware is ok) you will transform it into just a paper holder
updated kitkat bios restore tool to version 2 (foolproof version). read the main thread post at the beginning.
Good morning.
Please let me introduce my situation. I use Lenovo Yoga tablet 2 Pro. On 9-th of november I updated Android to 5.0.1. Unfortunately, one of my commercial aps now can not make a connection with external device (no appropriate information about USB connection is appeared).
I am affraid the problem lies on the Android 5.0.1 system. Before that everything had worked perfect.
That is way I decided to downgrade to the Androix 4.x.
I found above treads, but have some doubts.
Is above tool downgrade my system to Android 4.x or do I need to do some additional operations, to get back to the Android 4.x?
In the section - how to use it (point 5) we can read:
5. you can now start in DnX mode again and flash your stock KitKat rom (this step is quite known by now so i won't detail it, there's a lot of info on that in other threads), take OTA's, eat candies... whatever you like
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Can you give me some more detalis (links about that?)
Kind regards from Poland
Pietia.
pawlikp100 said:
In the section - how to use it (point 5) we can read:
Can you give me some more detalis (links about that?)
Kind regards from Poland
Pietia.
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you must:
1. Downgrade the bios using the restoring tool (you mention "Yoga Tab 2 Pro" so you must use the 1380 version), and you must do that so you can flash KitKat stock rom on your tablet (if you try to flash directly, without the bios downgrade it will fail and you will soft-brick your tablet)
2. After restoring the bios, download from here your stock KitKat rom and extract
3. Flash using Intel Phone Flash Tool (open with it the "flash.xml" from the target_bin directory of the extracted archive). the Intel Tool can be found in the tools directory of the same extracted archive.
4. After you finished sotck KitKat flashing, remember to set your contry code (####6020# in Contacts), also it's not necessary to make your settings wifi etc before you set your country code as they will anyway going to be deleted (a factory reset is performed on country code setting operation). if you don't set a country code you will fail when upgrading to Lollipop.
5. Update using the Lollipop OTA or stay on KitKat
Thank you for explanation.
I download system, installed Phone Flash Tool, open it and chose flash.xml, but after connecting my YT2Pro I can not see device specific with "Start to flash" button in the Device list area of the program.
see below screen. Is this screen looks as it should? (ups, unfortunately I can not post images, because I am new user).
One more thing, tablet should be turned off during flashing?
Right now my tablet is connected to the laptop by USB. It is not switched off and charging is in progress (laptop does not see my tablet as an additional disc/device).
Is above status correct?
Is there anyway to unbrick my onn surf 8? It shows the boot logo then turns off. I tried fastboot and SP Flash tool. Nothing works please help. Please provide me a rom supported with the model number 100003561
joshilita said:
Is there anyway to unbrick my onn surf 8? It shows the boot logo then turns off. I tried fastboot and SP Flash tool. Nothing works please help. Please provide me a rom supported with the model number 100003561
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Deadman posted a few images for that device:
https://forum.xda-developers.com/showthread.php?p=82619259#post82619259
Given what you describe, it sounds like your battery may be almost dead. You may still be able to get away with that in sp tools but it would be better if you could make sure you have at least a %30 charge. SP tools takes some getting used to, if you need help let me know. I'll try to keep an eye open for updates on this thread.
will160628 said:
Deadman posted a few images for that device:
https://forum.xda-developers.com/showthread.php?p=82619259#post82619259
Given what you describe, it sounds like your battery may be almost dead. You may still be able to get away with that in sp tools but it would be better if you could make sure you have at least a %30 charge. SP tools takes some getting used to, if you need help let me know. I'll try to keep an eye open for updates on this thread.
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Click to collapse
I don't think it works. I charged my tablet all night and i tried to use the SP flash tool again. I used the firmware started the download before connecting USB. I hear the tablet disconnecting and reconnecting constantly and SP flash tool doesnt find the device because the constant reconnecting.
I got somewhere with the fastboot. It showes the Orange State warning. It never showed that before. But it reboots back to the loading after 5 seconds I cant make it stop.
fixed
Okay, update. I dont know what I did but i think i unbricked the tablet. Is there any TWRP file for 100003561?
Hi.
To start off, I'd like to say im no expert with phones, I had phones mostly to call, watch videos and listen to music, and this is my first attempt at doing all the stuff I will be describing now.
From the beginning:
I bought a seller refurbished LG G2, which worked fine when I received it, I had to do some updates which my phone found automatically, and it ended at OS version 4.4.2.
I wanted to finally have a decent but cheap phone, however it couldn't play some games I wanted to play and thought "Maybe if I update OS to something new, it will work, and it looks better"
Here my journey to update the phone to Android 11 started.
I was looking at many different videos and guide and everything, how to root, first time I rooted was by accident, only later a better video instructed me how to do it properly, then I installed the trww or whatever its called. then it didnt work properly after using that recovery to install android 11, so I had to flash it to some old version I found for my device (My version is LG D802 btw). For some reason it now had only 11gb of space, instead of 32gb. Anyway, I tried installing root and twrw thing again. After getting root and the recovery program I clicked reboot in its options and now my phone is having an issue.
First off, I left it to charge over 9 hours. If its NOT connected via usb it does nothing, power button, volume buttons do nothing.
I tried connecting it to my phone to flash it, but nope, after few seconds it says my phone disconnected from the usb and try again, even tho it is connected and I can see in device manager that it's seen by my PC. Now, I tried to enter the download mode manually, and it worked.
It says that it's rooted and B0 above it (this number was going down over different roots, twrw installs and flashes and such, no idea what it is.
I tried to flash it again since Im in download mod, however now the main issue appeared. It goes well for 40% of the flash using the LG flash tool 2014, I can see the progress in the download mode on the phone's screen, however once it reaches that certain point it just resets and the program treats it as disconnected.
Now when I have the phone connected via usb it just flashes red between 1 and 3 times, LG logo shows up for several seconds, then it turns off, and repeats the whole process.
During the flashing, software instructed me to remove the batter and try again, so I looked up how to remove it, did it, put everything back together, and its still the same.
Please tell me what to do, I've already spent over 10 hours trying to fix it and I just bought this phone...
hi... if your phone flashes LG logo - i'd recommend a full TOT flash of the original Lollipop image as a starting point...
just make sure you download a proper TOT file for your d802 device (32gb model)...
you'll end up with a working stock Lollipop rom which you can later root and flash a custom rom (i.e. Lineage 18)
Stock TOT file is usually about 2.6-2.7GB in size (at least for my 16gb model)
this youtube video shows how to do it and what is required for the process...
i think there is also an older thread here on XDA on how to TOT flash a G2 device (try to search it)