LG Optimus L90 keeps crashing (even after factory resets/flashing stock ROM) - General Questions and Answers

I've had my LG Optimus L90 for 2-3 years and it began to get very slow about 3 weeks ago. Certain apps began to not open at all, and eventually it crashed and got stuck on the lg startup screen with 'fastboot' shown on too I white letters. I looked this up and apparently you have to deliberately enter fastboot mode, so I assume something wonky is up with my software.
Since, I've flashed stock kdz multiple times. It works fine perfectly for awhile, but after a day or two the home screen will begin to flash black and crash over and over, and eventually the phone reboots and gets stuck at the white T-Mobile screen, and sometimes the LG screen before that. Just last night, after yet another flashing of stock ROM, it just crashes out of nowhere without the usual home screen crashing and reboots and I had to flash stock AGAIN.
Am I doing something wrong? Do I have to clear out gunk from the internal or something? The phone works perfectly after I flash stock, and you can't tell anything is wrong until it the home screen starts to crash multiple times and eventually the phone crashes but wont boot up. It only lasts about 2 days max before it crashes again.
Thanks for any help!

alphanumero said:
I've had my LG Optimus L90 for 2-3 years and it began to get very slow about 3 weeks ago. Certain apps began to not open at all, and eventually it crashed and got stuck on the lg startup screen with 'fastboot' shown on too I white letters. I looked this up and apparently you have to deliberately enter fastboot mode, so I assume something wonky is up with my software.
Since, I've flashed stock kdz multiple times. It works fine perfectly for awhile, but after a day or two the home screen will begin to flash black and crash over and over, and eventually the phone reboots and gets stuck at the white T-Mobile screen, and sometimes the LG screen before that. Just last night, after yet another flashing of stock ROM, it just crashes out of nowhere without the usual home screen crashing and reboots and I had to flash stock AGAIN.
Am I doing something wrong? Do I have to clear out gunk from the internal or something? The phone works perfectly after I flash stock, and you can't tell anything is wrong until it the home screen starts to crash multiple times and eventually the phone crashes but wont boot up. It only lasts about 2 days max before it crashes again.
Thanks for any help!
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Related

Random screen crashes, freezes, glitches

Hello! I have a stock Android Lollipop 5.0.1 Nexus 5 and for the past week or so I have been experiencing a weird issue.
The device randomly crashes. By "crashes" I mean the screen goes black, but the backlight is still on (it's a lighted black). I can push the power button and it will turn completely black (locked) and if I push it once more it turns lighted black again.
To get the device back into usable state I have to keep the power button pressed until the phone resets. Sometimes I keep it pushed for a full minute and nothing happens, sometimes 10 seconds are enough. Sometimes it will go through the "Google" logo and then stay in the lighted black state until I finally manage to reboot it again. Sometimes it crashes again right after it boots up.
It's weird because a lot of the times it's ok throughout the day and then when I go out in the evening, I take it out of the pocket and I see it crashed. Sometimes it crashes while I actually use it.
Last night it started doing something else: instead of lighted black, the screen is filled with static noise. It doesn't move or anything, it's a still image. Today, when a crash like that occurred, the screen glitched first (random lines on the screen, some parts got moved, really weird). I will get some photos if it happens again.
The problem is that I can't identify what's causing it. There is no particular app or action that I do / use that triggers this. It also doesn't seem to be movement-based, as it sometimes happens while it's sitting still on a table.
I updated to 5.0.1 about a day before this started happening, but I'm still not sure if it's software or hardware-based.
I tried a factory reset and booting into safe mode, none of these helped. I will only consider flashing a custom ROM as a final resort, because I'm not sure if it voids the warranty.
PS: the device is still under warranty, but I'm away for the holidays and will be until the beginning of the next year. And I'd like to have a usable device, especially while I'll be on the road.
Smith_S9 said:
Hello! I have a stock Android Lollipop 5.0.1 Nexus 5 and for the past week or so I have been experiencing a weird issue.
The device randomly crashes. By "crashes" I mean the screen goes black, but the backlight is still on (it's a lighted black). I can push the power button and it will turn completely black (locked) and if I push it once more it turns lighted black again.
To get the device back into usable state I have to keep the power button pressed until the phone resets. Sometimes I keep it pushed for a full minute and nothing happens, sometimes 10 seconds are enough. Sometimes it will go through the "Google" logo and then stay in the lighted black state until I finally manage to reboot it again. Sometimes it crashes again right after it boots up.
It's weird because a lot of the times it's ok throughout the day and then when I go out in the evening, I take it out of the pocket and I see it crashed. Sometimes it crashes while I actually use it.
Last night it started doing something else: instead of lighted black, the screen is filled with static noise. It doesn't move or anything, it's a still image. Today, when a crash like that occurred, the screen glitched first (random lines on the screen, some parts got moved, really weird). I will get some photos if it happens again.
The problem is that I can't identify what's causing it. There is no particular app or action that I do / use that triggers this. It also doesn't seem to be movement-based, as it sometimes happens while it's sitting still on a table.
I updated to 5.0.1 about a day before this started happening, but I'm still not sure if it's software or hardware-based.
I tried a factory reset and booting into safe mode, none of these helped. I will only consider flashing a custom ROM as a final resort, because I'm not sure if it voids the warranty.
PS: the device is still under warranty, but I'm away for the holidays and will be until the beginning of the next year. And I'd like to have a usable device, especially while I'll be on the road.
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I have none of your issues, try booting the device in safe mode and see if the problems still occure. It must be a or multiple downloaded apps that are causing your issues. Or try a data factory reset and restore/download your apps one by one amd try to identify the culpritt.
gee2012 said:
I have none of your issues, try booting the device in safe mode and see if the problems still occure. It must be a or multiple downloaded apps that are causing your issues. Or try a data factory reset and restore/download your apps one by one amd try to identify the culpritt.
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I said in the post that I tried both of those things. The crash occurred seconds after booting in safe mode and factory reset did not help either.
Smith_S9 said:
I said in the post that I tried both of those things. The crash occurred seconds after booting in safe mode and factory reset did not help either.
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Flashing the 5.0.1 factory image in fastboot should fix your issues. Or try flashing system.img first, maybe thats enough.
Same issues with my Nexus 5
gee2012 said:
Flashing the 5.0.1 factory image in fastboot should fix your issues. Or try flashing system.img first, maybe thats enough.
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I am experiencing SAME exactly issues in my N5 with 5.01 and 5.1 . EXACTLY... you are not alone
Seems a software problem (third party app ?) , started in 5.01 and now is in 5.1 , of course system and boot images where flashed with fastboot, so no solution using
Stock, Rooted, using Nova Launcher - Smartwatch 2 - Google Cardboard - Chromecast and many apps.
But started ..if memory helps .. after installing Cardboard 3D apps.
reimer1 said:
I am experiencing SAME exactly issues in my N5 with 5.01 and 5.1 . EXACTLY... you are not alone
Seems a software problem (third party app ?) , started in 5.01 and now is in 5.1 , of course system and boot images where flashed with fastboot, so no solution using
Stock, Rooted, using Nova Launcher - Smartwatch 2 - Google Cardboard - Chromecast and many apps.
But started ..if memory helps .. after installing Cardboard 3D apps.
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Click to collapse
My phone had an issue with the screen. I went to the LG service and they replaced the screen entirely, so that's that.
again and again...
i'm in the same case... I don't have any clues or solutions, i'm just wainting like a dumb... I don't know what to do, i always have to make the thing with the power button and the lower sound button to make it show the boot screen, but it glitch after few seconds... PLS HALP

Blinking Logo phone not working.

Please help my phone is confused like it is blinking lg logo but not getting on. In charge it gets on but in few seconds it gets off.
I think you are in soft brick state for some reason.. Did you try to do anything prior to this situation?
How did that happened? Similar issue happened to me, heres my post from other thread:
My H955 suddenly rebooted and it keeps on bootloop. It turns on fully and after 10-30 seconds (the hotter it gets, the less time it stays booted up) reboots again. After I left it to cooldown, there was error that root is gone or smth like that, and I had to agree to EULA and terms&conditions but the phone rebooted again. Maybe some kind of update was pushed in or whatever. This is the first time for me to happen. I have not installed new apps or mods on my phone like in two weeks.
Btw, seems like this is soft reboot, because there is no sounds and it didn't asked for SIMs PIN. I guess it has something to do with xposed..
I have used this method http://www.hard-reset.mobi/lg-g-flex-2-hard-reset/#to do factory reset. It seems to work, however phone still reboots. @mnshkpr8 try this to do factory reset, maybe this will help you.
Later I will try this http://forum.xda-developers.com/g-flex2/help/to-unbrick-g-flex-2-ls996-t3286105
Hi. I have similar problem here.
My phone wont pass LG logo if without charging on, the phone keep booting.. And if i charging on the phone just works fine, but if i plug out the charger the phone just turn off and restart again. Mine still using stock rom. Any suggest ?
This happened to me today as i edited one system file so I could get any app on split screen, I used flashtool and flashed the same kdz in normal mode, It flashed and everything is normal again.
any solution to this?

XT1033 showing unusual behavior. Keeps rebooting and keeps hanging

This happened yesterday. I was on CM 13. Everything worked fine. But now, the phone kept rebooting whenever I ran an application. What's worse, it started hanging for 5 minutes and even the power button didn't respond, after which it heated and then rebooted.
I flashed the stock ROM 5.1 Asia retail and the phone said,"Starting apps 1/76" and when it reached 76/76, the phone rebooted. When I tried opening recovery, the phone showed a black screen and kept showing the bootlogo, going black, bootlogo, going black, and again.
I've tried installing other recoveries but the same thing happens.
Basically, the phone is dead.
The only thing that works is bootloader.

S8 plus Dead black screen

Hi,
A month ago, first time screen of my S8 plus (15 months old) went black, i can see the phone is working fine apart from screen, tried force restart, every button combinations available on other forums, nothing worked. After like 10, hours screen went on by itself. It lasted a week and screen went off again. Again same thing, it went back on by it self after few hours. I though it might be the corrupt software, so i flashed the factory rom. But no luck. This cycle kept going on for a month.
Now since last week, screen went dead, not turning back on. I can connect the phone to screen via smart view (Bixby voice helps there surprisingly), and see everything else works fine.
Phone is out of warranty, so i cannt just go to samsung and get a replacement.
Does anyone have any idea, what is going on, and if they have face any similar issue and what to do with it.
Also, one weird thing. I dont know if its related to the issue but I noticed every time after i factory reset or flashed stock rom, some random files start downloading itself via download manager and every time i tap to look for the name or info, it just disappears, tried to find it among apps and file, nothing can be found.

Random Restarts After Rooting

A week ago I rooted my note 20 ultra. Everything works really well. The only problem I have is the random restarts. Sometimes when I use my fingerprint unlock the phone just crashes into the boot screen and then boots back up to the home screen. Whenever the prompt comes back up to put in my pin, I put it in and the phone crashes again. This happens a few more times until it stops occurring and I am able to log in perfectly. I believe that the issue could be occurring due to a lack of memory, but I would like some second opinions. What do you guys think?

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