Yoga 2 1050L certificate verification failed - Lenovo Yoga Tab 2 Questions & Answers

Hi,
Have no luck with this Tabby.
Tab was lagging like hell, so I just did a reboot (long press power button and select reboot). Now the Tab doest boot anymore. if I connect a USB cable it tries to start but a blue box appears "certificate verification failed" If I press a volume button a startup.nsh will be loaded an I see a shell. Thats all. but I cannot enter any command, hence there is no keyboard.
A few months ago I had the problem that the tab didnt boot anymore also out of nowhere but hung up in fastboot starting... I disassembled the tab, soldered wires onto the bios chip and programmed with a bios file from an old KK FW version I downloaded. after that the Tab booted normal. Soldering was a pain in the ass, and I really don´t want to do that again. Maybe it will not help anyway.
What happened to that tabby and what can I do?

Related

[Q] Stuck on the OTG Test

Hi, i ust bought a Lenovo IdeaTab A-1000 some hours ago. But suddenly, when powering it on, i press the power & vol + & vol - button. Then it brings the Test Factory menu. It stucked here. Trying the "adb reboot" command, but its says "Command not permitted" and still stuck on the OTG Test. I cant hard boot [Pressing the power button some seconds]. Anyone wanna help? I think i have to wait until the battery completely empty, but its so long. Ive waited for 3 hours now, i think when i first open it, the battery levels is 50%. Still stucked. Help me please
Hi,
i think it's ok now but i just had the same problem. i found a very little hole just near the sdcard port : uncover the sdcard connector and put a pin in that hole, not the one with the "S" stcker (i think it's a screw) and it will make a hard reboot of the tab.
hope it was helpfull !

[Q] How can I get into fastboot mode without volume key?

Hello guys, I'm new here and I hope you can help me out.
Let me make the story short.
My phone's screen broke and I replaced.
In that processes I lost the rubber that stick
to the panel of the volume. I was fine with that since my phone
in vibrate mode and I really don't use ring tone in my daily basis.
I tried to download Android 5.0 lollipop and flash it.
How did I get there? well since I did not have a volume button,
I downloaded an app that restarted my phone and got me into
fastboot mode without the key (I did got me where I wanted).
Then the problem was that in the middle of writing the .img
the freaking cheap bastard micro usb unplugged!!!
BAMM!! phone now is bricked, I cannot get into recovery/fastboot mode
since I cannot press the volume key and my phone is bricked.
I tried going through fastboot mode via my computer again,
but the computer doesn't recognize the device since it still
looping there forever at the google logo. I try installing USB
DRIVERS to see if I could do some "magic" haha. Got
error "This device cannot start ..." And still at the same problem.
I know I can get back to my recovery if order the part for the volume
key, I ordered the part to replace it, but trust me I was 3 weeks without
my phone and now this problem
Is there any way that I can get to fastboot mode to factory reset my phone
without volume key with a bricked forever looping a "google" logo ? :fingers-crossed: :fingers-crossed:
I appreciate any help.
vadeld said:
Hello guys, I'm new here and I hope you can help me out.
Let me make the story short.
My phone's screen broke and I replaced.
In that processes I lost the rubber that stick
to the panel of the volume. I was fine with that since my phone
in vibrate mode and I really don't use ring tone in my daily basis.
I tried to download Android 5.0 lollipop and flash it.
How did I get there? well since I did not have a volume button,
I downloaded an app that restarted my phone and got me into
fastboot mode without the key (I did got me where I wanted).
Then the problem was that in the middle of writing the .img
the freaking cheap bastard micro usb unplugged!!!
BAMM!! phone now is bricked, I cannot get into recovery/fastboot mode
since I cannot press the volume key and my phone is bricked.
I tried going through fastboot mode via my computer again,
but the computer doesn't recognize the device since it still
looping there forever at the google logo. I try installing USB
DRIVERS to see if I could do some "magic" haha. Got
error "This device cannot start ..." And still at the same problem.
I know I can get back to my recovery if order the part for the volume
key, I ordered the part to replace it, but trust me I was 3 weeks without
my phone and now this problem
Is there any way that I can get to fastboot mode to factory reset my phone
without volume key with a bricked forever looping a "google" logo ? :fingers-crossed: :fingers-crossed:
I appreciate any help.
Click to expand...
Click to collapse
Im not sure why your text is like this? But paraphrasing buddy comes a long way
Just hold the power button, until it dies, or just let it die in general since your volume button (You only need Vol down and Power) to power it off completely. Since your Volume keys are gone, the best solution is to wait for the replacement before doing so, unless you can get the contact keys to trigger the Volume button, you're in a loss atm. No OS or Volume keys means you can't trigger ADB commands or boot into fastboot. Just wait it out I guess?

I think I bricked my ZTE Blade C2 v809

Please help me. I am in a sort of panic right now.
I have a ZTE Blade C2 v809, sold here in Portugal as Meo Smart A12. It was rooted and working fine. I was however getting some error 24's trying to install apps. I thought this might have had to do with using Titanium Backup to remove TouchPal (I did make a backup first), so I decided to restore TouchPal. There were however some errors in the restore and it was stuck there, so I decided to reboot the phone.
Chaos. Now it wont boot. If I press the button normally, the phone boots, I see the android logo, the screen goes black (Not shutdown black, a sort of light black background) and nothing happens. If I try to boot into Recovery mode by holding the power button and the volume down key, I just get the android logo stuck there, nothing happens. If I hold the power button and the volume up key, I get the picture of that laying down android with the message error.
Any more info I must provide please tell me, I am desperate for a solution, If I lose this phone I wont be able to get another one.
Okay I fixed it. Turns out the recovery menu DID work if I waited for a long time and tapped the screen. Used the update.zip available from the site, and it works like a charm
Yay, I bricked my phone, too.
I did something similar, changed recovery-from-boot.p name to recovery-from-boot.p-bak and install-recovery.sh to install-recovery.sh-bak
Now the phone doesn't boot properly, in fact it's stuck in a boot loop:
>starts
>shows white ZTE logo on screen
>restarts
Tried connecting the phone via USB cable and used fastboot devices & adb devices commands, no devices found.
Also tried pressing "power + vol down" and "power + vol up", nothing. I can't enter recovery mode or bootloader.
Apparently the remaining way to get in it's trough the SD slot, or maybe there's another way.
I kindly ask for help, couldn't be possible that I ruined this cell phone so fast.
Ideas, somebody?

How can i connect to Kies/Odin WITHOUT HomeButton or running System?

Maybe any1 got any Idea?
Problem:
1. HomeButton does not work - i have a new one connected, no Funktion (just put the connector in, didnt open the Phone)
2. Went into Recovery from System -it worked before- did Factory Reset to clean (want to give it to the kids)
3. Does not boot - shows only "Kernel is not ...." and the Samsung Galaxy S5 + android Logo, as i would before getting the system up.
Tried:
Boot from SD -maybe sth wrong there?
Kies
Odin
ADB
Hope:
Windows starts connection Sound - sometimes
Kies did recognize sth - but could not connect
Again I am not able to do Volume Down/UP + Power + Home Button <-broken on Board?
Did read some Posts here and there, but always at any Point the Home Button is used.....
Any Ideas or Solutions welcome.....
(And i dont want to open the Phone since there is already a small crack in the corner)

Fix device without recovery mode

Hello dear xda community
I have a px6 device from the company "Wondefoo" installed in my Mazda (without any hard buttons). It worked so far so good, but ZLink (Apple Carplay) didn't work, so I tried to fix this. To do that, I rooted the device, uninstalled the "ZLink" app and reinstalled a newer version. Then I tried to reboot. And then my problems started:
The device doesn't boot anymore. It tries to start up, I can see the Android 10 boot logo ("multi-media on-vehicle Navigation System" screen), but after about one minute, this logo disappears and the screen remains black.
OK, easy fix --> Just go into recovery mode and reset the device. But here's the big problem: I can't get into recovery mode.
Here's what I tried:
1. Ignition off and on --> Screen still black
2. Press "Reset" button (my device only has this one physical button) --> Boot process started again, but same outcome
3. Unmount the device, plug the power out, wait an hour, plug it in again and try again --> Boot process started again, but same outcome
4. Tried to connect with adb over Wi-Fi to the device (used the last known IP address) --> Connection timeout, Wi-Fi probably not started yet
5. Press&Hold "Reset" button until lights beign to flash to get into recovery mode --> Lights never flash because the "Reset" button somehow breaks the power circuit and when I release it, the device gets power again and boot process starts again with same outcome
6. Press&Hold "Reset" button for a minute, then release it, then press it again quickly within 1sec --> Boot process started again, same outcome
7. Tab with 5 fingers on the boot logo --> Nothing happened
8. Attached keyboard and pressed "Alt" + "PrintScreen" + "I" all the time --> Nothing happens. Keyboard is with RGB LEDs, so I saw it was active when the boot logo was displayed... Then, the LEDs on my keyboard turned off which was telling me that there is no keyboard input possible anymore
9. I even tried this: https://forum.xda-developers.com/t/new-method-enter-recovery-no-physical-buttons.4013453/ --> I just have one similar cable, not two as described in this post... So I put everything together again and just tried again --> Boot process started again, same outcome
Well... Is there any option left? I'm thinking about buying a USB male-to-male cable and try again with adb, but everyone tells me that I need to get into recovery mode first which I really can't
* Is there any other way to get into recovery mode? Maybe with my keyboard?
* Does anyone have another idea what I could try? Maybe without recovery mode?
Thanks in advance and cheers
T
As you said:
1. Ignition off and on
2.Have ready the needle for reset and do that instantly as you see the boot logo.
Once device restarted, wait until will see the boot logo again and pull out the ignition key.
3. Put in an USB socket a pen drive with the right firmware
4. Put back the ignition key and let it in ON position, without starting the engine. The update process will start, have a bit of patience until will finish. The device will restart at the end of the update, and straight after the boot logo, shortly press the reset button.
With a bit of luck, will have a fresh firmware on your device.
Thanks for your quick answer.
I tried what you said several times, but unfortunately I always end up on the black screen, no matter what I try.
My usb stick flashes quickly during the boot process, but nothing happens with it.
I also tried with an USB male-to-male cable and connect via adb, but it won‘t connect...
t-to-the-a said:
5. Press&Hold "Reset" button until lights beign to flash to get into recovery mode --> Lights never flash because the "Reset" button somehow breaks the power circuit and when I release it, the device gets power again and boot process starts again with same outcome
Click to expand...
Click to collapse
Are you sure you are holding the reset button for long enough?
On my machine (Dasaita) you hold the reset and the machine turns off... but you have to keep holding it even after it has turned off. Could be upwards of 1.5 minutes. Once the lights flash (and finished flashing), release and press one more time within 3 seconds.
Thank you for this idea. I have tried 30 seconds, but no more until today...
Now I tried with 1min, 2mins, even 3mins, but nothing happens.. I think the power is immediately cut as soon as I press the reset button. So there is probably no way to fix this easily
I also contacted the seller, but they have a talent to not understand my question. I just get answers like "press the reset button 2 sec and then everything is fixed" or "plug in the USB drive with the new ROM and press update" - of course that doesn't help.
Well I guess I'm left with one last thing: Throw this device away and buy a new one. Not from Wondefoo anymore of course, and hopefully with a working reset button.
I have the same issue. What did you end up doing?
Where did you buy your unit from?

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