Possible couses of LG Optimus g screen flicker - Android Q&A, Help & Troubleshooting

Hello!
For a while my phone is having some issues. At first my phone was getting really hot after using it for few mins. That would result in awful performance. Now that issue is gone. However, now it is getting much worse. Yestreday turned my phone on and saw something like this https://i.ytimg.com/vi/dCNCNRti1Xs/hqdefault.jpg At first i was thinking my phone lcd has gone bad. But after messing around i got in google play.. And no issues with screen there. So pressed back button..and everything was back. - colorful lines etc. Got into market again. Downloaded lcdtest. Turns out that red, green, blue, white displays just fine. But grey.. is flickering. And if im going from grey to any other color - all the colorful lines appear again, until i switch to any other color. Most apps work fine, unless they have dark grey parts. (When the phone gets hot , it gets colorful lines no-matter what) I even managed to get homescreen usable by using white background.
What might be the reason of this? Is it LCD issue? GPU, or CPU? I downloaded stability test too. What i found interesting is that on the classic test, it works just fine. However, the cpu + gpu test makes phone hot really fast, and half of screen turns into flickering mess. Could it by gpu going bad, or is it lcd?
Im using lg e975, stock.
Thanks!

Hi, If I had to guess I would say it is a LCD issue, it is also completely normal for a device to get hot whilst doing GPU or CPU tests. If you still have a warranty, I would recommend getting it looked at.

Related

[Q] Row of stuck pixels!

Hi all,
I've had my gTab since May, and have been loving it.
I just flashed to Flashback HC last night, and it too is awesome.
However, this morning I was messing around with playing video and suddenly a full horizontal row of pixels went cyan and is stuck.
I thought maybe it was a software glitch, so I did a hard reboot. It's still there.
When I first turn on the screen, the row of pixels is red, then quickly fades to cyan.
It's not super noticeable on the home screen, since my wallpaper is blue, but on any screen with a light background it looks terrible!
Is there anything I can do or am I stuck with a warranty return?
I had been thinking of trying to replace the screen with a better LCD, but that discussion seems to have fizzled, so I don't think it's an option right now.
Any suggestions appreciated,
-Elmojo

[Q] Green Screen Galaxy

I just picked up my S3 and the whole screen had a hazy green tint on the lock screen and was the same when I unlocked, and I wasn't gonna mess about so rebooted quick and back to normal now, and I read another thread about it but isn't clear why it happens, but I checked the battery graph and there's just a huge gap as if no power was getting through at all, so has anyone else had this happen on S3 and what's causing it?
Michael_P said:
I just picked up my S3 and the whole screen had a hazy green tint on the lock screen and was the same when I unlocked, and I wasn't gonna mess about so rebooted quick and back to normal now, and I read another thread about it but isn't clear why it happens, but I checked the battery graph and there's just a huge gap as if no power was getting through at all, so has anyone else had this happen on S3 and what's causing it?
Click to expand...
Click to collapse
Just had this, I put my phone into my shoulder bag, cycled for 10 minutes, picked up the phone and the entire screen was green as if the red and blue pins from a monitor cable had disconnected.
I'm also having charging difficulties, although that may be the cables.
I'm on CM9, literally just updated to the newest nightly now to see if that sorts any issues. There's something just not quite right about this phone of mine. A quick reset was all it took to sort the screen out but it was scary to think such an issue could occur.
All I know is it's something to do with a sudden dip in power and I read about other phones doing it too very occasionally, and after it happened there was a gap on the battery chart as if the phone was getting no power at all.
Sounds like the OS or at least an important process crashed or got stuck (deadlock, livelock, ...).
Green color has something to do with the rendering process and/or screen calibration. All Galaxy S1 with Voodoo patches for the display color values show a green screen for a very short instant after screen-on.
That also explains the gap in the battery stats since a non-functional OS cannot collect any informations.
Did you run any particular apps which might be causing it?
Without any details I can only recommend the standard package: flash your OS again, factory-reset it.
Maybe wiping the cache is enough. Maybe it's a hardware fault, hard to say...
I just rebooted and I've already upgraded since then, and I wasn't doing anything really at the time except I think that was around the time I used G L to SD and it broke the Play Store, but when it Hulked on me I hadn't touched phone for 40 minutes and that's what I saw when I woke it up. but most people say it's a once in a lifetime thing so not really worried.

[Q] Backlight faulting

Has anyone else had issues with their back light faulting? I've searched and have seen that other sprint evo lte users have had issues with screen flickering, but my problem seems to be more serious that that. when i wake up in the morning the screen is blank. thank god i have a custrom rom installed and can manually mess with the status bar slider to get the backlight to turn back on. It just needs to be tweaked here and there. the backlight seems to only like to work on full brightness, if not, it will flicker like crazy. if i press with more pressure on certain parts of the screen the backlight turns off completely until i remove my finger. I dont think its a proximity issue since it'll just flicker sitting on a desk. Do I need to replace the screen? is this worth it? i havent dropped to phone or anything for this to default. I can upload a video later. gonna use my OG evo for that which is still kicken by the way
I realize this thread is incredibly old, but did you ever find a solution to the flickering problem? I just started seeing the exact same behavior, including the screen going dark when putting pressure on certain areas of the screen.
Thanks!
I have a PJ75100 doing this, but the screen does not function at all. I get the orange/green light while charging, and if I power it on it acts as if it's doing it's regular startup, but nothing shows on screen.
I did update the stock firmware with the latest release ruu, but still no screen.
I'd really like to get this one going as it's not the normal Jewel, it's the white and silver one, and my girlfriend wants it to replace her iPhone 5c.
Sent from my EVO using XDA Forums Pro.

[Q] Black shows as red. Colors compromised on I9305?

Hello.
I've been using my I9305 a while now with a 4.4 OMNIROM.
Everything was fine until I let my girlfriend borrow it to use the gps for a trip.
She returned it and I noticed the colors are strange. All the blacks went greyish, and gradient colors werent smooth but showed artifacts.
I thought it was a setting but after factory resetting/wiping everything/changing rom the phone still has strange colors, even the green boot android icon seems abit light.
Here are some screenshots showing the same pictures on my phone (the samsung) and a functional HTC. You can see the artifacts and the distorted blacks.
Code:
[img]imgur.com/BbUKzzN.jpg[/img]
[img]imgur.com/sAIiDnB.jpg[/img]
Is it possible she dropped it and damaged the screen/matrix?
Is it possible that some connector to the lcd/digitizer got slightly disconnected? (maybe i should try disassambling)
She used several apps (tomtom, navigon) that have nightmode (screen altering modes), maybe its stuck or damaged.
Please help
cyborgsattack said:
Hello.
I've been using my I9305 a while now with a 4.4 OMNIROM.
Everything was fine until I let my girlfriend borrow it to use the gps for a trip.
She returned it and I noticed the colors are strange. All the blacks went greyish, and gradient colors werent smooth but showed artifacts.
I thought it was a setting but after factory resetting/wiping everything/changing rom the phone still has strange colors, even the green boot android icon seems abit light.
Here are some screenshots showing the same pictures on my phone (the samsung) and a functional HTC. You can see the artifacts and the distorted blacks.
Code:
[img]imgur.com/BbUKzzN.jpg[/img]
[img]imgur.com/sAIiDnB.jpg[/img]
Is it possible she dropped it and damaged the screen/matrix?
Is it possible that some connector to the lcd/digitizer got slightly disconnected? (maybe i should try disassambling)
She used several apps (tomtom, navigon) that have nightmode (screen altering modes), maybe its stuck or damaged.
Please help
Click to expand...
Click to collapse
Seems like a hardware problem to me. I would try and watch lcd replacement videos to see if the screen is correctly plugged to the motherboard.

Flicker on Always-On Display only. Anyone else have this issue?

Brand new V30, just opened yesterday. Everything is running well except for a weird white flicker on the AOD. It's horizontal, from the edge in, about a sixth of the way across the screen. It doesn't flicker when anything else is on the screen but the AOD.
Any ideas?
Here's a video of the issue
https://imgur.com/a/QNioxAk
Thanks!
I would replace the phone, thats is 100% not normal, i have had my phone for 4 months now and this has never happened to me. Just to rule it out you dont have any screen overlay apps running right,?
edit: also a factory reset wouldn't hurt.
Does this also happen in low brightbess?
Looks similar (just in very very small) like what my display had after i crashed with my bike ?
I forced gpu rendering in developer options and changed the aod display to the normal clock and then back and it seems one of those two things fixed it. will keep an eye on it though.
Came back briefly this morning. will continue to monitor.
I got it on eBay which makes returning/warranty stuff a little more annoying than usual.

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