[620] Boot Verification File! - Cause : MISMATCH_SIG_LEN - LG Leon Questions & Answers

I try to upgrade to MARSHMALLOW my LG LEON OP, but i had a Bootloop, and i cant boot my phone. I cant enter to Download Mode or Recovery Mode. The screen of my phone flashes with this message in a corner [620] Boot Verification File! - Cause : MISMATCH_SIG_LEN and the LG logo in the center. I dont had TWRP before this problem, so i dont now what to do. Please i need help. Also i try to did a Hard Reset, but after i do, i come back to the previous screen
HELP QUICKLY!!!

GoRi7o3 said:
I try to upgrade to MARSHMALLOW my LG LEON OP, but i had a Bootloop, and i cant boot my phone. I cant enter to Download Mode or Recovery Mode. The screen of my phone flashes with this message in a corner [620] Boot Verification File! - Cause : MISMATCH_SIG_LEN and the LG logo in the center. I dont had TWRP before this problem, so i dont now what to do. Please i need help. Also i try to did a Hard Reset, but after i do, i come back to the previous screen
HELP QUICKLY!!!
Click to expand...
Click to collapse
Did you try to flash Marshmallow for h340n on h345? If yes, flash back 5.1.1 Lollipop

LuciIT said:
Did you try to flash Marshmallow for h340n on h345? If yes, flash back 5.1.1 Lollipop
Click to expand...
Click to collapse
How can i flash a stock rom if i cant enter in dowloand mode or recovery mod, thanks for your attention

Related

[Q] Unbrick L7 p708

This is a different brick, I flashed a baseband v20 for L5 on the L7, when I rebooted there was only a iluminated black screen, the problem is that I can't enter on any SW/Upgrade, recovery, emergency mode etc. I'm only able to flash with fastboot, but I haven't find a way to reflash baseband or whatever to unbrick my L7.
Could you giveme something to flash and runbrick my L7?
PD: When I try to flash System.img it says "File too large"
Oh I think there is no way... To flash a new baseband you must can boot into recovery... Did you tried CWM on PC?
No
TheAvngrZ said:
Oh I think there is no way... To flash a new baseband you must can boot into recovery... Did you tried CWM on PC?
Click to expand...
Click to collapse
No, how can I do that? do I have to turn on the phone? Because it doesn't enter on any mode, just fasboot
I'm sorry, I can't help you by that thing. Seek for CWM and PC I dont know how to do it...
Enter into the Emergency Mode. By Removing the Battery & Connect to the Charger & Press home+Power+Vol up.Then Flash the ROM again
Thanks, problem solved.
Thanks to everyone, the problem was that I couldn't see when it was on emergency mode, the screen never showed me anything, because it was only in black, anyway, I tried all combination buttons until I fount that vol down+put usb without battery installed new drivers on Windows 8, then finally I could flash stock. Again thanks.

phone wont boot

i was running fine with grevious v4 with twrp 2.6.3.3, today decided to upgrade to twrp 2.6.3.5 and did it and then rebooted to recovery and i get to fastboot mode screen but can reboot into os and all is well, worried about lost recovery so tried lgflash tools to go back to stock and it said my device does not match(somehow even though i have att lg g2 my phone shows up as lgd802 after installing grevious v4 so unknowingly edited build.prop to lgd800 and now phone wont boot at all even recovery not any good and now when i start my phone it boots and sits at lg splash screen and green light keeps blinking but nothing happens, cant use adb, please help me to fix my phone. any help greatly appreciated.
lingarajug said:
i was running fine with grevious v4 with twrp 2.6.3.3, today decided to upgrade to twrp 2.6.3.5 and did it and then rebooted to recovery and i get to fastboot mode screen but can reboot into os and all is well, worried about lost recovery so tried lgflash tools to go back to stock and it said my device does not match(somehow even though i have att lg g2 my phone shows up as lgd802 after installing grevious v4 so unknowingly edited build.prop to lgd800 and now phone wont boot at all even recovery not any good and now when i start my phone it boots and sits at lg splash screen and green light keeps blinking but nothing happens, cant use adb, please help me to fix my phone. any help greatly appreciated.
Click to expand...
Click to collapse
Have you tried getting to your recovery with the hard button combo??
jverm said:
Have you tried getting to your recovery with the hard button combo??
Click to expand...
Click to collapse
i tried but it goes into fastboot mode.
lingarajug said:
i tried but it goes into fastboot mode.
Click to expand...
Click to collapse
Download mode you mean?
jverm said:
Download mode you mean?
Click to expand...
Click to collapse
yes i can enter download mode and i tried using lgflash tools to revert back to stock but it said files and phone model do not match even though i have the correct version, when i try to go into recovery it goes to fastboot mode. and when i restart phone it sits at lg bootlogo.

[Q] LG G2 D802 Stuck on LG Logo

Hello guys, i got a big problem with my lg g2.
When I turn it on, it gets stuck at the Lg Logo and nothing happens from there.
I tried going to download mode and flashing a stock rom but to no avail.
I tried this : http://forum.xda-developers.com/showthread.php?t=2432476
but when the phone actually restarts at the end of the process, it gets stuck at the logo again and the light keeps on flashing.
I also tried the TOT method to flash the mobile to stock rom but i always get "LAF retrieveGPT() failed"
Every time i switch the mobile on, it stays at the lg logo
Does anyone knows what i should do now?
Thanks in advance for any help given.
Have you try to hard reset after kdz flash?
Did the hard reset but when the phone starts, it gets stuck at the logo screen again.
I just tried to flash again with another TOT and it actually worked until the phone restarts by itself and gets stuck at the logo again.
That is, on the flash tool it shows that the phone is restarting to complete the installation but the phone just gets stuck at the logo and then after a few seconds the flash tool shows that the process has failed.
Any suggestions?
I'm having the exact same problem:
When I turn the phone on, it is stuck on the LG screen
I cannot enter recovery mode (holding power + volume down...)
I cannot enter download mode - it shows fastboot screen instead
I'm completely lost as what to do??? I think I've just wasted a phone
I can't do any of the fixes that I can find because I'm not able to enter download mode, the LGMobile Support Tool wont recognize my phone etc
Hello mate, there's an easy fix to be able to get download mode.
Download this and extract it in your local disk ( C:\boot )
((seems like i can't post links before 10 posts))
Go on google and download fastboot to your pc and find a laf.img for your phone varient
Then open cmd and type:
cd C:\boot
fastboot erase recovery
fastboot erase laf
fastboot flash laf laf.img
fastboot reboot
That will fix your download mode immediately.
But I do not know any further. Once you get access to download mode, try flashing the kdz or even TOT files and let me know if you are able to pass the logo screen.
Cheers
WubbLoaW said:
Hello mate, there's an easy fix to be able to get download mode.
Download this and extract it in your local disk ( C:\boot )
((seems like i can't post links before 10 posts))
Go on google and download fastboot to your pc and find a laf.img for your phone varient
Then open cmd and type:
cd C:\boot
fastboot erase recovery
fastboot erase laf
fastboot flash laf laf.img
fastboot reboot
That will fix your download mode immediately.
But I do not know any further. Once you get access to download mode, try flashing the kdz or even TOT files and let me know if you are able to pass the logo screen.
Cheers
Click to expand...
Click to collapse
Sorry, I don't know what you're saying. If you can somehow direct me to the link that would be great! :good:
if you give me the name of another thread, I should be able to search for it
I finally found it lol.
http://forum.xda-developers.com/showthread.php?t=2477595
Just follow the steps but you need to find the laf.img for your phone varient. The laf in the link is not for D802.
WubbLoaW said:
I finally found it lol.
http://forum.xda-developers.com/showthread.php?t=2477595
Just follow the steps but you need to find the laf.img for your phone varient. The laf in the link is not for D802.
Click to expand...
Click to collapse
that worked! I'm now using the LGMobile support tool to try and reinstall the original firmware - I will let you know how it goes once that's complete
EDIT: It said that software install was complete, but I'm still stuck on the LG Boot screen
EDIT 2: just tried the steps from here: http://forum.xda-developers.com/showthread.php?t=2432476 - it now loads the LG boot screen, then and android guy (with hexagonal shape?) and blue bar underneath, and then back to the LG Boot screen
IM GOING CRAZY HERE!!! what am I supposed to do to fix this
Yeah, i'm stuck just like you.
Just sent it for repairs at a local shop because I also was going nuts over this.
If it becomes alright, I'll ask the guy to explain what he did and I'll write it here in a few days.
Patience my brother.
http://uncle-yakuza.jouwweb.nl/lg-g2-fast-boot-menu-fix
This page includes a link for the files you need
MasterThiefGarrett said:
This page includes a link for the files you need
Click to expand...
Click to collapse
Thanks :good: I have already done this (as you can see above), however I cannot complete the last step which is flashing the new firmware. I'm still left with the LG logo after doing this
Any updates?
Well guys, its been a long time since I'm having this problem and I didn't find any solution.
Anyone knows how i can fix this?
Or any suggestions?
Thanks in advance

Unable to boot Yureka

After manual lollipop upgrade through OTA, I am unable to boot my yureka. Everytime I try to boot my phone used to show the YU logo, and switch off itself.
I couldn't even go into the recovery. But, I can get into the fastboot mode.
Please help !
prince.d.emperor said:
After manual lollipop upgrade through OTA, I am unable to boot my yureka. Everytime I try to boot my phone used to show the YU logo, and switch off itself.
I couldn't even go into the recovery. But, I can get into the fastboot mode.
Please help !
Click to expand...
Click to collapse
See this post made by xx88 HERE, and say thanks to him.
prince.d.emperor said:
After manual lollipop upgrade through OTA, I am unable to boot my yureka. Everytime I try to boot my phone used to show the YU logo, and switch off itself.
I couldn't even go into the recovery. But, I can get into the fastboot mode.
Please help !
Click to expand...
Click to collapse
just flash stock recovery at fastboot mode.......... ur problem will be solved...............
prince.d.emperor said:
After manual lollipop upgrade through OTA, I am unable to boot my yureka. Everytime I try to boot my phone used to show the YU logo, and switch off itself.
I couldn't even go into the recovery. But, I can get into the fastboot mode.
Please help !
Click to expand...
Click to collapse
Try to go to recovery with vol + - power.
Clear cache
Reboot
anilsvadhyar said:
Try to go to recovery with vol + - power.
Clear cache
Reboot[/QUOT]
i too have the same problem. i even cant enter into recovery...pls help
---------- Post added at 12:11 PM ---------- Previous post was at 12:08 PM ----------
my yureka phne isnt booting. it jst showa yu logo on power on and after that it jst shutdown. i tried frm stock recovery to twrp recovery but no use....pls help me..
Click to expand...
Click to collapse
prince.d.emperor said:
After manual lollipop upgrade through OTA, I am unable to boot my yureka. Everytime I try to boot my phone used to show the YU logo, and switch off itself.
I couldn't even go into the recovery. But, I can get into the fastboot mode.
Please help !
Click to expand...
Click to collapse
I had a same problem which u had..but i have flashed it and now rooted again installed apcman rom and sandy kernel.to unbrick ur yureka
just follow the video and they gace the link for file s too...
http : // questionrs.com/tube/tTPndZhY0EQ/how-to-unbrick-yu-yureka-lollipop-cm12-yu-yureka-stucked-at-yu-logo

Lg v20 stuck into bootloop no download mode only recovery | please help

HI I PUT MY PHONE ON CHARGE SO IT SHOWED THAT I AM USING AN HANDSFREE SO I RESTARTED MY PHONE BUT NEVER TURNED ON AGAIN ITS STUCK INTO A BOOTLOOP
IF I TRY TO GET INTO DOWNLOAD MODE IT SHOWS DOWNLOAD MODE FOR 5 SECS THEN RESTARTS AGAIN
IT DOEST NOT BOOT INTO FASTBOOT ALSO AND MY PHONE WAS ON OFFICIAL STOCK ITS AN F800L MODEL ON OREO 8.0.1
I CAN ONLY GET INTO FACTORY MODE BUT IF I RESET MY PHONE IT STUCKS ON BOOTLOOP AGAIN, PLEASE HELP ME...
ANYONE??? PLEASEEEEEE :crying::crying::crying::crying::crying::crying::crying::crying::crying::crying:
hamzarawal said:
HI I PUT MY PHONE ON CHARGE SO IT SHOWED THAT I AM USING AN HANDSFREE SO I RESTARTED MY PHONE BUT NEVER TURNED ON AGAIN ITS STUCK INTO A BOOTLOOP
IF I TRY TO GET INTO DOWNLOAD MODE IT SHOWS DOWNLOAD MODE FOR 5 SECS THEN RESTARTS AGAIN
IT DOEST NOT BOOT INTO FASTBOOT ALSO AND MY PHONE WAS ON OFFICIAL STOCK ITS AN F800L MODEL ON OREO 8.0.1
I CAN ONLY GET INTO FACTORY MODE BUT IF I RESET MY PHONE IT STUCKS ON BOOTLOOP AGAIN, PLEASE HELP ME...
ANYONE??? PLEASEEEEEE :crying::crying::crying::crying::crying::crying::crying::crying::crying::crying:
Click to expand...
Click to collapse
I'm sorry for your loss. To me it sounds like something may be physically damaged.
To elaborate a bit further, fastboot doesn't usefully exist without root, stock recovery can only wipe your userdata, and you've already said download mode reboots way too early to try anything. There is no safe way to try anything with the firmware, if it even somehow is a firmware issue. There's the leaked firehose, if you force it into 9008 mode, but that's risky and I have no personal experience with it to give more details.
Basically don't expect it to be coming back.
Phoenix591 said:
To elaborate a bit further, fastboot doesn't usefully exist without root, stock recovery can only wipe your userdata, and you've already said download mode reboots way too early to try anything. There is no safe way to try anything with the firmware, if it even somehow is a firmware issue. There's the leaked firehose, if you force it into 9008 mode, but that's risky and I have no personal experience with it to give more details.
Basically don't expect it to be coming back.
Click to expand...
Click to collapse
SO THAT MEANS IM NEVER BUYING AN LG AGAIN:crying:
boot in fastboot flash twrp and reinstall laf partition
Lussardi said:
boot in fastboot flash twrp and reinstall laf partition
Click to expand...
Click to collapse
Without it already being rooted and the dirtysanta bootloader installed there is no fastboot mode on anything (which you would have seen if you had read the OP) but the h918 (which still can't flash with it) and us996, and you still need a working phone to actually set the options in Android to allow unlocking the bootloader.
And I'd put it at like an 80% chance it's hardware failure anyway, since it's boot looping in download mode too.
Try holding down volume down and plugging in USB.......
Same issue herewith...
LG V20 boot loop , restarting again and again , also when USB cable method is applied to enter into the Download Mode , it also restarts after sometime after showing download mode icon etc........

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