G2 Screen backlight flickering problem - G2 and Desire Z Q&A, Help & Troubleshooting

Greetings to all members.
A couple of days ago i received a new G2.
As soon as i rooted it i installed http://forum.xda-developers.com/showthread.php?t=1605016
Everything completed and the phone would operate normally. I let it fully charge during the night. Next morning i installed some apps from the market (skype fb and a weather widget), then i let it charge again for 20 minutes or so. When i got back to see if it charge, the screen was dimmed like in power saving mode, it wouldn't go back no matter what and the phone hanged there.
I got the battery out and upon rebooting the screen was still dimmed.
I got back to 2.3.3 stock which i had backed up to SD from clockwork, but the problem continued.
I contacted the seller and said they would ship a new one as soon as i sent them the shipping back notice. The thing is i don't want to wait half a month or even more to get the new phone.
I've attached a video of the problem.
I played with the brightness levels on 4.2, you will notice that if i put it on 100% the screen goes completely black.
Also when i put it in standby with the power button and push it again the screen starts flickering for some seconds before it gets stabilized again.
Thanks in advance for your time.

Johnny91i said:
Greetings to all members.
A couple of days ago i received a new G2.
As soon as i rooted it i installed http://forum.xda-developers.com/showthread.php?t=1605016
Everything completed and the phone would operate normally. I let it fully charge during the night. Next morning i installed some apps from the market (skype fb and a weather widget), then i let it charge again for 20 minutes or so. When i got back to see if it charge, the screen was dimmed like in power saving mode, it wouldn't go back no matter what and the phone hanged there.
I got the battery out and upon rebooting the screen was still dimmed.
I got back to 2.3.3 stock which i had backed up to SD from clockwork, but the problem continued.
I contacted the seller and said they would ship a new one as soon as i sent them the shipping back notice. The thing is i don't want to wait half a month or even more to get the new phone.
I've attached a video of the problem.
I played with the brightness levels on 4.2, you will notice that if i put it on 100% the screen goes completely black.
Also when i put it in standby with the power button and push it again the screen starts flickering for some seconds before it gets stabilized again.
Thanks in advance for your time.
Click to expand...
Click to collapse
Are you using automatic backlight?

Johnny91i said:
Greetings to all members.
A couple of days ago i received a new G2.
As soon as i rooted it i installed http://forum.xda-developers.com/showthread.php?t=1605016
Everything completed and the phone would operate normally. I let it fully charge during the night. Next morning i installed some apps from the market (skype fb and a weather widget), then i let it charge again for 20 minutes or so. When i got back to see if it charge, the screen was dimmed like in power saving mode, it wouldn't go back no matter what and the phone hanged there.
I got the battery out and upon rebooting the screen was still dimmed.
I got back to 2.3.3 stock which i had backed up to SD from clockwork, but the problem continued.
I contacted the seller and said they would ship a new one as soon as i sent them the shipping back notice. The thing is i don't want to wait half a month or even more to get the new phone.
I've attached a video of the problem.
I played with the brightness levels on 4.2, you will notice that if i put it on 100% the screen goes completely black.
Also when i put it in standby with the power button and push it again the screen starts flickering for some seconds before it gets stabilized again.
Thanks in advance for your time.
Click to expand...
Click to collapse
Sounds to me like it is really a hardware issue... while it's understandable that you don't want to wait for a new phone to arrive, it is better than ending up with a dead backlight...

It really was a hardware issue, took another one back after a month and it works great.
Thanks for your help guys

Related

[Q] Odd problem, phone won't boot.

Volume button on my HD was playing up for the last few days so I decided to reset the phone today via the power button just incase it might help, since then it hasn't started up again, I get 3 buzzes after I've removed and replaced the battery and then the amber light flashes constantly.
I was running CM7 for a while but went back to stock as I missed the sense UI so I should be on the most recent update.
It's a pain because I'm on holiday so have no access to my PC, I have access to Macs but I'm not sure there is even an HTC sync style application for that system.
Many thanks in advance for any help.
Ok, phone was left off for ~24 hours, battery totally flat, I switched it on and at screen came alive, unfortunately the sim hadn't been inserted properly and phone demanded I reset it, when I did back on the fritz, will give it another 20 minutes or so, hopefully will be back to the same state where I can start it again and go from there, were there any bad 2.3 updates that I possibly installed when I went back to stock?

[Q] reboots randomly when screen is off

Ok maybe you guys can help. I'm having the strangest problem.
I'm running cyanogenmod nightly 151 and last night I was using the torch widget on bright for a little while and the battery died. Charged it back up and when I unplugged it in the morning it rebooted to white htc logo screen. Booted up normally and as soon as screen times out it reboots again. It did this a number of times so I Did a complete wipe and installed an older nightly, same issue. Full wipe and installed a stable rom, same thing. Then I noticed when I leave it on the charger I don't have the rebooting problem, only on battery power, so I replaced the battery. Same issue. Then I noticed that if I constantly use the phone it doesn't reboot. Only when the screen times out. Set the time out to 30 mins and left it idle. 30 mins later it rebooted. Turned off the "screen off animation" thinking that was the problem, no luck. Flashed back to stock official tmobile rom, same issue! Tmobile is sending me out a new phone and battery but just for curiosity sake and so it doesn't happen again, any ideas on what it could be? Definately gonna avoid that torch widget in the future! Thumbs up to tmobile customer service for their no haggle "overnight me a phone for 5 bux" customer service!
To sum it up, when phone is on charger no problems. When phone is running on battery, anytime the screen goes out, either by hitting power button or by it timing out, it instantly reboots to htc logo.
chrisconley1 said:
To sum it up, when phone is on charger no problems. When phone is running on battery, anytime the screen goes out, either by hitting power button or by it timing out, it instantly reboots to htc logo.
Click to expand...
Click to collapse
Flash a fresh version..or a stable one.
Sent from my HTC Desire Z using XDA Premium App
Yea I flashed 5 different ones, first I flashed back to the previous release that included a different kernel, then the stable rc1, then the stable before that, then I flashed the stock rom with root. There's nothing on my phone now except stock software and root. As soon as I hit the button to turn the screen off it reboots. The real question is what exactly happens when the screen goes off that the phone isn't liking? Its speedy and everythng works great for as long as the screen remains on. Its gotta be a hardware issue if I've tried so many different roms right? Or is there some core piece of software that nightly 151 changed that none of the other roms I'm flashing are changing?
Update: if I have music or navigation on and I turn the screen off the phone doesn't reboot until the song ends or route ends! Lol wth is up with this? It only reboots on idle? Maybe processor drops too low?
Update. Phone stopped rebooting every time the "screen goes off / all processes stopped" and now only does it very randomly, almost hardly ever. Its like its repairing itself lol. Htc cyborg! New phone should be here tomorrow. I was really hoping to figure this out though. Oh well

[Q] Nexus won't turn on.

I have just received my new phone from the insurance company as my last one got stolen. At first it seemed fine, I put it on charge, reset the phone and logged into Google. After a few minutes I went to check on it and I cant get it to turn on (or maybe its turned on but the screen isn't).
What should I do? Is this a common thing? Thanks.
Did you pull the battery, reinsert it and hold the power button down for a few seconds?
Also, when you were charging with the phone off did you get the charging graphic on the screen?
hEaTLoE said:
Did you pull the battery, reinsert it and hold the power button down for a few seconds?
Also, when you were charging with the phone off did you get the charging graphic on the screen?
Click to expand...
Click to collapse
Thanks for the reply, i think i have fixed it now.
A better explanation of the problem I was having:
After a small amount of time the phone would freeze and very slowly the screen would fade to black, like the power to the screen had been taken away.
Even after pulling the battery, it wouldn't turn back on unless I waited without-battery for a while.
How i think i fixed it:
Waited a while with the battery out and turned back on, when i managed to turn it back on it had a half downloaded 4.0.4 update (could this have caused it?)
I kept trying to make it last long enough to download the whole update file, luckily it resumed from where it was last.
After installing the update it's been fine.
Sounds like a case of 4.0.2-itis.
4.0.4 is the wonder cure for all phone problems!

[Q] Phone turned off/crashed

My phone had about 60% battery last time I checked but I just went to unlock it and the phone didn't respond. I tried to turn it on by holding the power button wasn't getting any response from the phone
I've plugged it into the charger and didn't get any charging light so again I held in the power button and nothing! I kept trying and eventually the buttons lit up and it started to boot...
I've had the phone for 2/3 days now and this is the first problem I've had but it's still a little worrying!
Just wondering if anyone else has experienced anything like this? I'm on the 1.26 software.
I had this on one occasion when adding the messages widget to the home screen. When I powered the phone back on I got a request to send HTC a bug report.
Arthur Hucksake said:
I had this on one occasion when adding the messages widget to the home screen. When I powered the phone back on I got a request to send HTC a bug report.
Click to expand...
Click to collapse
Interesting. I didn't get the bug report.
I'm hoping it was just a software bug but I haven't seen any other complaints on the forum yet.
I have just noticed a problem with my phone too, turned it off for the first time last night, on start up this morning it started ok but did not load completely and froze for about 30 seconds on the home screen with no app icons showing. It then rebooted and started up ok with the bug report. I then turned off the fast boot and tried again, it booted correctly first time. Would there be any particular apps which would cause this to happen on fast boot?
Hey mate, currently having the same problem as you. Have no clue what to do. My battery was at about 50% and it just crashed when i was playing riptide. Now it wont turn on or anything. Even when the phone charger is plugged it, it wont budge. Have you found a fix?

LG G3 D855 shutsdown on its own

Hello,
So I bought a G3 the day before yesterday and yesterday was my first day with it, and for that first day my phone had shutdown twice on its own. The first time was when my phone was lying on the bed and doing nothing, it had around 50% battery and was not hot or anything.
The second time was this night i don't know when, i have put my G3 on the charger and went to sleep i woke up and it had shutdown.
I didn't made factory reset when i got i from the box which i will when i come home from work and hopefully this will fix it, but does anyone have a problem like that? If is something serious i will be disappointed to return the phone.
p.s. My previous phone was galaxy s2 and had this king of problem only with custom roms and kernels, but i have not put anything on the G3 yet, except activating the developers options and had switched it to ART and the first time the phone had shutdown i thought that the art was the issue and switched it back to dalvik, the second time though was on dalvik.
Dredd90 said:
Hello,
So I bought a G3 the day before yesterday and yesterday was my first day with it, and for that first day my phone had shutdown twice on its own. The first time was when my phone was lying on the bed and doing nothing, it had around 50% battery and was not hot or anything.
The second time was this night i don't know when, i have put my G3 on the charger and went to sleep i woke up and it had shutdown.
I didn't made factory reset when i got i from the box which i will when i come home from work and hopefully this will fix it, but does anyone have a problem like that? If is something serious i will be disappointed to return the phone.
p.s. My previous phone was galaxy s2 and had this king of problem only with custom roms and kernels, but i have not put anything on the G3 yet, except activating the developers options and had switched it to ART and the first time the phone had shutdown i thought that the art was the issue and switched it back to dalvik, the second time though was on dalvik.
Click to expand...
Click to collapse
I have the exact same problem. The past few days when I go to bed and wake up in the morning, the phone has shut itself off. I haven't rooted or installed any custom roms.
I would advise you both to take a factory reset, only install apps you need for a few days and see if the problem persists, if it doesn't install your apps back one by one as it may well be a particular app causing the reboots.
If you still get reboots after the reset and with no apps installed then you may have to take the phone back to swap it.
Lennyuk said:
I would advise you both to take a factory reset, only install apps you need for a few days and see if the problem persists, if it doesn't install your apps back one by one as it may well be a particular app causing the reboots.
If you still get reboots after the reset and with no apps installed then you may have to take the phone back to swap it.
Click to expand...
Click to collapse
Yes as I said in the first post the factory format and hard reset will be the first thing that will be done as soon I am at home. About the apps i have pretty much basic apps (facebook, messenger, soundcloud, etc) all from the market except smashhit of which i have the apk and installed from the internal memory.
Except those apps I have 2 mp3s and some wallpapers and nothing else, becouse when i got my phone it was late on the evening and i had no time to do anything else. So the phone is pretty much out off the box and I was verry frustrated when the secound shutdown happened, becouse i tought the first was from the ART runtime.
Anyway today I will have more time to spend on the phone and we will see what will happend.
p.s. The phone does not reboots, just shuts off.
Dredd90 said:
Yes as I said in the first post the factory format and hard reset will be the first thing that will be done as soon I am at home. About the apps i have pretty much basic apps (facebook, messenger, soundcloud, etc) all from the market except smashhit of which i have the apk and installed from the internal memory.
Except those apps I have 2 mp3s and some wallpapers and nothing else, becouse when i got my phone it was late on the evening and i had no time to do anything else. So the phone is pretty much out off the box and I was verry frustrated when the secound shutdown happened, becouse i tought the first was from the ART runtime.
Anyway today I will have more time to spend on the phone and we will see what will happend.
p.s. The phone does not reboots, just shuts off.
Click to expand...
Click to collapse
Is it definitely off or is the phone just stuck on a black screen? It is quite common on some devices when something is not quite right for the kernel to be unable to wake the phone up, the phone is still technically on but stuck in deep sleep.
does holding the power button for 2 seconds turn it on? or do you have to hold it for say 7-8 seconds?
Lennyuk said:
Is it definitely off or is the phone just stuck on a black screen? It is quite common on some devices when something is not quite right for the kernel to be unable to wake the phone up, the phone is still technically on but stuck in deep sleep.
does holding the power button for 2 seconds turn it on? or do you have to hold it for say 7-8 seconds?
Click to expand...
Click to collapse
It is definetly shut down around 2 seconds(the normal time to hold the power button to turn on) it turns on and work perfectly and does not show anything suspicious in its behavior, it's super fast, not laggy and etc, may be a little high on ram consumptions but with this havy skin i think it is normal or could not be normal idk, the ram consumptions go from about 1,2GB the lowest i have seen to up to 2,3 the highes i have seen.
Anyway about the shut off think yes defenetly 100% sure it is off, it happend again a while ago and i thoght the same thing may be it si deep asleep even i had chacked the weather 10 min ago and call myself from a friends phone and the operator said that the phone is off or i am somewhere without network covarage.
i got same problem. it turn off it selft and black screen even battery still 70%. rmust remove the battery to restart again, ealy bad. huft
mandrive said:
i got same problem. it turn off it selft and black screen even battery still 70%. rmust remove the battery to restart again, ealy bad. huft
Click to expand...
Click to collapse
If you have to remove the battery to get it to restart then its not actually shut off, its just stuck in deep sleep! which is usually caused by a bad app.
Yes if you have to remove the battery the problem is different, i just have to push the power button and it boots right away after it have shuted off by its self........
i didnt have this issue with my 855. but i did a factory reset after i got the phone just for the hell of it
So it's reset time i finally have some time to the some staff on the phone so hopefully everything will be fine. I will post if this fix or not the problem to inform the other people in this thread.
Dredd90 said:
So it's reset time i finally have some time to the some staff on the phone so hopefully everything will be fine. I will post if this fix or not the problem to inform the other people in this thread.
Click to expand...
Click to collapse
did you have any luck with the problem? I have the same issue, performed a factory reset and restored, hopefully it will fix too..
Hi all!
I have and have had the same problem and think I've pinpointed the problem to Google Search but can't 100% confirm it yet. I didn't do a factory reset when I got the phone and it shutdown during the night. I did a factory reset, made sure it got enough time to update everything properly. Problem was gone and worked fine. HOWEVER, the phone kept asking me which home screen I prefer at random times when I hit the home button. With random I mean like 4+ times per day. I searched the net and found a threat saying that a guy with a G2 solved the problem by removing Google Search updates. So I decided to do just that and get the factory version back and the questions disappeared but guess what, the phone shut down the following night.
Any takers or might this just be random? Note that it was working fine for three days with the updated Google Search and shutdown the first night after the downgrade.
So I did hard reset and so far so good the phone had not shutted down itself, and I updated everything which need to be updated (mentioning this for the guy with the upper post). So far so good I will keep you in touch if something goes bad...
Dredd90 said:
So I did hard reset and so far so good the phone had not shutted down itself, and I updated everything which need to be updated (mentioning this for the guy with the upper post). So far so good I will keep you in touch if something goes bad...
Click to expand...
Click to collapse
Let me know if you also encounter the problem with the home screen questions! :good:
Good luck!
mandrive said:
i got same problem. it turn off it selft and black screen even battery still 70%. rmust remove the battery to restart again, ealy bad. huft
Click to expand...
Click to collapse
Had you enabled ART instead of Dalvik ?
turt said:
Had you enabled ART instead of Dalvik ?
Click to expand...
Click to collapse
whether the use of ART
The problem will be resolved?
I suggest take it to your dealer and get it replaced asap. I've seen lots of returned phones(my job at XXXXXXX company ) with the same issue, and as long as the defect is reproducible the dealer will give you a new phone. If it's outa replacement period then they'll probably repair it.
aaaaaaaaaaaaaaaaaaaaand shut down again but this time it took quite a bit time longer to shut off by its self so i tought the problem was fixed, but it's not, so i am going to the store which i buy it from to replace the device.....
Does this also happen with the korean models?

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