STRANGE LG G4 bootloop - Android Q&A, Help & Troubleshooting

Hello guys!
It all started today in the morning when I opened Instagram application on my G4 (H815 model) and suddenly the phone froze. After 15 or 20 seconds it tried to reboot itself but it went straight into bootloop. It's not acctually a bootloop. It tries to go past loading screen and reboots another time and after that all I can see is LG logo.
I tried to enter recovery mode. No success. I tried updating/flashing KDZ file with LG Flash Tool and I got error everytime saying there was not enough information....
Last thing I tried was to boot into download mode. It shows Firmware Update screen but I don't thing ADB is working. I tried command adb devices and it found nothing.
I'm so desperate now as I need phone tomorrow. I hope it's not hard-bricked. Do any of you have idea what to do?
Any help apprechiated
TIA
Nejc

Related

Strange stuck LG P500

Hi, i've a strange (but i hope common and resolvable) problem.
After all, i say that i searched through the forum (with the search function) but with the solution that i found and tried i didn't solve anything.
I start saying that i got a p500 with a broken sdcard reader board (it simply doesn't have a microsd 'cause doesn't recognize).
That phone some days ago just shut down and went stuck on the LG Logo.
I tried at first the hard reset (home+vlm down+pwr), nothing happens.
I tried then the recovery mode and try to update with lg updater, and didn't work, lg doesn't recognize the phone on the updater (but on the main screen of the BBc app does).
After some tries, (dumb tries, for example leaving it without battery for some hours), and searching, i did two ways:
-KDZ Firmware update way, selecting 3gqtc and diag on lg logo, or recovery (and recovery sc) on recovery screen, nothing done.
-LGMDP for installing fastboot and CWM and v20e. It completes the operation but nothing changes, the lg is still stuck on the lg logo.
The last thing that i noticed is that one time, powering on the phone, button's leds flashed about 4-5 times. but if i try to re-do the action, doesn't get anymore.
I would know if there is another way to exit from this stuck-screen.
I hope opened the topic on the right section.
faglmt said:
-KDZ Firmware update way, selecting 3gqtc and diag on lg logo, or recovery (and recovery sc) on recovery screen, nothing done.
Click to expand...
Click to collapse
When you say recovery and recovery sc, you mean EMERGENCY and CS_EMERGENCY, right?
So, you tried selecting these options while on the black menu of recovery (like the Clockworkmod one) or on the yellow screen saying Emergency Mode!! ?
In case you were on the recovery, try the following: remove the battery and, while holding the volume up and back keys, connect the phone to USB. After that, try using KDZ selecting EMERGENCY.
But in the case you were correctly on the emergency mode and just used the wrong words here, then I'm sorry but I don't know what else you could try to solve your problem (wait and see what other ideas people will come up with).
When you say recovery and recovery sc, you mean EMERGENCY and CS_EMERGENCY, right?
Click to expand...
Click to collapse
Yup, sry it's late night and i got confused with words.
I'm can go on the yellow screen and "EMERGENCY MODE" is texted on center.
And on KFC Used both modes of emergency (even diag).
I tried to do this without battery, but the result is the same. When it reboots stucks up on the lg logo. =(
Uh, i forgot to post the errors of kdz:
Upgrade error
WParam: 100
LParam: 500
Here is the log: http://pastebin.com/4SECdaT4

[ROM Problem] Strange stuck LG P500 but not the usually problem

Hi, i've a strange (but i hope common and resolvable) problem.
After all, i say that i searched through the forum (with the search function) but with the solution that i found and tried i didn't solve anything.
I start saying that i got a p500 with a broken sdcard reader board (it simply doesn't have a microsd 'cause doesn't recognize).
That phone some days ago just shut down and went stuck on the LG Logo.
I tried at first the hard reset (home+vlm down+pwr), nothing happens.
I tried then the recovery mode and try to update with lg updater, and didn't work, lg doesn't recognize the phone on the updater (but on the main screen of the BBc app does).
The last thing that i noticed is that one time, powering on the phone, button's leds flashed about 4-5 times. but if i try to re-do the action, doesn't get anymore.
I would know if there is another way to exit from this stuck-screen.
I also post the log of error i get from kdz:
Upgrade error
WParam: 100
LParam: 500
Here is the log: http://pastebin.com/4SECdaT4
Other things i forgot to say:
I don't need to shake the phone, if kdz doesn't detect, i take off the battery, and turn on the phone in emergency mode (up+back+pwr).
Sometimes kdz works without that error, but it reboots the phone and it stucks again in the lg silver logo.
I read about a wipe of /system through adb, but if i try to mound /system, i get the command list.
I can't do adb devices, doesn't detect the phone, and in sequence to this, can't open the adb shell.
any suggestion?
You recovery got corrupt when it was stuck on LG logo, which could be easily solved by fastboot method of recovery flashing.
I was on the same situation like you are on now. Now follow this:
Try booting into fastboot mode by pressing "Power+ home buttons"
If it does then notify me here or at PM.
Between this is not the appropriate section for this thread.
I tried to fastboot, i did fastboot erase recovery and fastboot flash recovery recovery.img commands, no errors, but when i type fastboot reboot, on the screen i read: rebooting the device, but it doesn't reboot. If i take off the usb cable, (after a big time, 10 mins for example), a --suspend-- appears.
if i take off the battery, the lg logo is stuck again, and if i do home+vol down+pwr the clockwork mod doesn't appear.. any suggestion?
See your PM
Sent from my LG-P500 using Tapatalk

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Ok, today i was trying to change my Bootanimation (which i've changed several times already), but i've encountred a huge problem.
My phone has stucked on On/Off loops at the first time after i've changed the bootanimation...
Well i've tried to enter Recovery Mode.. but.. hmm.. how should i put it... My phone got stuck on it aswell..
My phone is looping in Recovery mode (i know that because there is the logo with the "No command thing"),
The device is turning off, then back on every 7~15 seconds after enerting automaticly into Recovery mode..
I've tried every single key pressing on the On/off key and Volume keys.. but in failure.. the Recovery mode won't goes out, and the device still loops.
Okay... now What i've tried also.
I've tried to connect my device into my computer trying to getting a shell trough ADB. but in failure, cause of the device loops in Recovery Mode, adb and the computer won't recongnizing my device.
Ok.. Flashing?
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ok.. i've talked too much..
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I broke my lenovo vibe s1. I remembered i had a old lg e460, so i tried turning it on. At first all i could get was logo to show up. I waited a while but nothing happened, so i did a bit of research. Next i tried getting the phone in recovery mode and when i did it i got a picture of android with exclamation point in red triangle. After some more research i determined i needed to root my phone so i downloaded lg support tool and connected my phone to computer. after installation finished i turned my phone on, lg logo showed up after 2 seconds logo spined around and i could here booting sound, after that nothing happened.
After a ton of research i tried rooting my phone with lg flash tool. Everything goes well but on 3rd step upgrade stops at 5% when it says S/W upgrade in progress and it gives me a option to retry i do that and the same thing happened.
I tried upgrading with lg support tool again, but when i connect my phone it says latest software installed or something like that. sorry for my bad English
Im stuck and need help
Sorry for my bad English

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