Has anyone experienced a dead back light on their EVO?
I flashed Caulkin's rom 2 days ago.. it has worked flawlessly for those 2 days.
Today, I used my phone, ended a call, plugged it into my car charger, and then the next time I tried to use it, the screen was dead.
I can see everything on the LCD in direct sunlight, but the back light won't light.
I've booted into recovery, flashed, etc.. still no back light - ever.
The lower keys still light up.
edit: Also, the phone is hot as hell. Like the 4g radio is on and I'm doing benchmarking all at the same time. CPU shows idle-ish, and 4g radio is off.
Other than turning it in (I need to flash back to stock) is there anything I can do?
Thanks...
cj00ta said:
Has anyone experienced a dead back light on their EVO?
I flashed Caulkin's rom 2 days ago.. it has worked flawlessly for those 2 days.
Today, I used my phone, ended a call, plugged it into my car charger, and then the next time I tried to use it, the screen was dead.
I can see everything on the LCD in direct sunlight, but the back light won't light.
I've booted into recovery, flashed, etc.. still no back light - ever.
The lower keys still light up.
edit: Also, the phone is hot as hell. Like the 4g radio is on and I'm doing benchmarking all at the same time. CPU shows idle-ish, and 4g radio is off.
Other than turning it in (I need to flash back to stock) is there anything I can do?
Thanks...
Click to expand...
Click to collapse
The heat makes me think there was some kind of hardware failure. I'd assume something like this would be covered under the 1 year HTC warranty.
Back when I had my TP, whenever the phone would get too hot the backlight would 'disconnect' I guess to prevent damage to the phone, once the phone cooled down the backlight would come back to life... try it. I had to remove the battery to make it happen and let it cool down for a good 2 or 3 hours before I was able to get the backlight again. This happened because:
1 the phone was on direct sunlight OR
2 bad AC adapter overloaded the battery
I thought the same. I had the battery out for about 2 hours.. still the same thing.
Flashed the stock rom.. knowing that it wouldn't help (even when I boot into bootloader, still no BL).. but it's at least ready for Sprint in the morning.
FWIW, I was first in line on launch day for this phone. It's had some seriously heavy use.
But in the ~14-15 years of owning cell phones.. I've never had an issue like this.
Hi All,
I've had my (entirely stock) tab for about 4 months, and my patience is wearing thinner and thinner with it.
Frequently - perhaps once a day, I will go to use the tab and find that it has turned itself off. The battery will not be flat; but it's randomly shut down. Most of the time it will restart ok.
However, sometimes - perhaps 1 in 3 times - it won't turn on. I end up holding the button down for ages, letting go, trying again. After about a minute of messing around, it will turn on. Again, the battery will not be flat.
Also, sometimes when using it, it will randomly "warm" reboot - that is, it will lock up for a few seconds, then give me the boot animation before restarting the UI. Athough this is usually a lot faster than a full boot from cold.
Sometimes when the thing is in standby - not being used - i will suddenly hear the sounds from the boot animation. I presume this is the same as the point immediately above, just when i'm not using it.
Does anyone else have these problems? i.e. does my tablet have a hardware fault, or is the tab10.1 just a poor quality product?
thanks
slip
There are about 3 threads going on regarding this. There is an issue with the power button on some older model. If you search you will find it, I just read it last night.
I had the deep sleep problem ( won't turn on after holding the pwr once to make it sleep ) a lot on 3.1 but on 3.2 I only have that problem when my tab is in it's keyboard dock.
Keyboard dock + sleep = generating that 'won't awake problem' but as mentioned, there are a few threads about this yeah.
ladybeefcake
Who can tell me or help me
usb charging on laptop is not working with galaxy task 13.1 Slim
Can not enable with Gscript an SU on , usb charging
ladybeefcake said:
Who can tell me or help me
usb charging on laptop is not working with galaxy task 13.1 Slim
Can not enable with Gscript an SU on , usb charging
Click to expand...
Click to collapse
Flash pershoots kernel
HELP,
yesterday, I was using my nexus 7 for normal use, wasn't playing game, just browsing with chrome. the battery was 8 percent when I last saw it. I then proceed to charge it, but the thing suddenly just shut down itself. I thought I misread the battery percentage, so I charge it anyway. about an hour later, i checked on my nexus 7, turn it on, got to the boot screen, got to the home screen, use it for about 15 minutes, and suddenly, the screen black out, it was flickering like crazy, and making some white noise ish sound. I panicked so I hold down the power button and turn it off. I turn it on again, and after about 30 seconds, the same thing happened again. I was using motley's kernel with 520 GPU, and I thought, maybe my nexus 7 cant handle the GPU OC. So I went to recovery, tried playing with recovery for about a minute or so, but the screen didn't flicker at all on the recovery. So I flashed the 484 GPU version of motley's kernel. When I reboot to system, the same thing happened again. So I thought, maybe if I restore to my old backup, it would not be like this any more. so I wipe the data, dalvik, and cache, and I restore my old backup. But the same thing happened again, only this time, after I turn it off, it make a high pitched sound.
I waited for about 6 hours, and now when I turn my nexus 7 on again, it works normally.
So, what has happened to my nexus 7?
bump
I'd say it is the overclock. Graphic cards do some weird stuff when overclocked. You can burn up your GPU doing that and cause it to forever freak out. I always shied away from GPU overclocks.
Sent from my Nexus 7 using xda premium
would that cause any permanent damage?
keni.mardira said:
would that cause any permanent damage?
Click to expand...
Click to collapse
It should be ok if you reflash back to stock rom to make all the hardware back to reset mode. A warning always given when we try to flash rom with oc created.
i also experienced this one, also received a battery warning and then suddenly screen went blank. then same weird thing happened as the one above. I'm on paranoid android rom and i'm quite sure it's not overclocked or something. Was only able to get back to normal by holding the power button for around 15-20 seconds...
Happens to me
This will happen to me a lot when my nexus 7s battery dies, I plug the tablet in and then immediately try to start it up. It will work for around 30 seconds then look like an old TV without a signal. I am on stock everything, no rooting or custom Roms (yet). I always thought it had something to do with battery calibration being off and the tablet not having enough power to run, because it always works fine when I charge it before attempting to boot.
I have also noticed that every once in a while the screen will have a vertical line of pixels flicker.
Same thing happened to me yesterday...
I got the "low battery" warning and after some time the screen started flickering in many colors and there was a weird static noise.
I pushed the on/off button, but it wouldn't turn on again. After a few minutes of charging, I could turn it on again.
This isn't normal behaviour, is it? Shouldn't the N7 perform a regular shut-down when the battery has no juice left?
I'm on the rooted stock rom btw.
androidswagz said:
This will happen to me a lot when my nexus 7s battery dies, I plug the tablet in and then immediately try to start it up. It will work for around 30 seconds then look like an old TV without a signal. I am on stock everything, no rooting or custom Roms (yet). I always thought it had something to do with battery calibration being off and the tablet not having enough power to run, because it always works fine when I charge it before attempting to boot.
I have also noticed that every once in a while the screen will have a vertical line of pixels flicker.
Click to expand...
Click to collapse
+1 bro. I am having the same problem. what do we need to do ? it is same with all nexus 7's . should we claim the warranty or just neglect it ? wat say ?
Aditya88 said:
+1 bro. I am having the same problem. what do we need to do ? it is same with all nexus 7's . should we claim the warranty or just neglect it ? wat say ?
Click to expand...
Click to collapse
I faced the same problem. I dont know when the battery might have drained out, but on starting the tab on low battery, it suddenly started showing black screen with little grains and suddenly stopped with a noise. I charged, started the tab again while charging, and the battery reading stuck at 21% even after charging for 20 mins. Within 5 mins, it happened again. Now after 35 mins of charging, I start it again, it boots normal, and now its reading the battery percentage in an incremental value (started with 22%) and now its again stuck at 23%
Is this a HW related issue? Or do you think it is more of SW related issue? If it is more towards the HW side, we better have it replaced. Mine is C70 model.
bump
just happened to me... it may have run out of juice... didn't turn on when I tried, so I guess it did... then I put it on the charger, tried booting it, went away for a sec and when I came back I also got this black screen with some flicker and a static noise...
will now try to charge it over night before trying again...
Nexus 7/Google problems
I received my Nexus 7 on Aug 21 after hearing the rave reviews. It didn't come with app for a camera, so I downloaded one.
The camera didn't work. I re-booted it & it worked this time. Downloaded Skype - whole reason for getting the tablet - to stay in touch with family that is far away. Tried to Skype - camera wouldn't work. Rebooted - worked this time again (getting tired of having to reboot for something I want to use to work). On Sept 2, sent message to Google inquiring about camera & app I downloaded. Only response - "thank you for contacting...blah, blah, blah - check out Q&A." All along, the tablet would shut itself down & reboot randomly (battery fully charged sometimes). On Sept 13, I shut it down & charged it. After a full charge, I tried to power it back on. Tried again several times that night & then the next morning. Called Google (who I bought it from). Told them I didn't want a piece of junk that wouldn't work. He told me it was past my remorse period. (The only remorse I have is buying their piece of crap instead of a reputable one.) I finally did get it to come back on, but camera hasn’t work since even after a complete factory reset. Any way – in order to get this one fixed, I have to “buy” a new one, then send back the old one & be reimbursed. Is this a legitimate business practice?
hi,
since today i have the same issue. did nothing special, just swichting from g currents to chrome. stock rom, no modifications, not rooted, everything original
n7 suddenly had a black screen(battery was at 28%). nothing worked, no powerswitch(10-30 secs). when connected to original power supply and cable, it boots up.. google logo .. glowing X.. lockscreen. then, approx. 30 sec later it turns off again(screen black). usb cable still connected. after some time it comes up again.. and repeats the procedure. after some cycles it stops, and when i reconnect the usb calbe it starts over again. sometimes, before it turns black, it shows a flickering screen and sometimes fizzling sound.
any suggestions?
I had this same issue right after the 4.2 ota update, after leaving it on charge overnight it seems fine now after a couple of discharge / charge cycles
Its like after the update it was over estimating the battery level
Sent from my Nexus 7 using xda premium
Same thing!
I have a completely stock Nexus 7, and the EXACT same problems are happening to me too! The first couple of times it happened my tablet would reboot normaly. But now, my tablet won't boot up at all. Any suggestions on what I should do? Also, remember, I have no mods installed.
Happening to me too.My N7 shut itself down because of low battery a couple hours ago and I haven't been able to get it to boot since. When I plug it into the charger it shows a flickering screen like a tv with no signal but with less white flickers. I've tried multiple chargers and cables but I could only get it to boot up a couple times and both times it did not show that it was charging even though it was plugged in and the battery was at 0% so as soon as it boots up it shuts itself down again because of low battery.
So now I've got it on the charger, screen all a'flicker, waiting for it to get a charge but I've got a feeling its not even charging because, like I said, the few times it has booted it showed the battery at 0% and not charging.
I guess I'll try to leave it alone for a while and see if it will start up after being plugged in for a bit.
EDIT: I let it sit there and charge for about an hour or so (with the screen flickering) and I was finally able to get it booted. It said it only had 3% battery but now it seems to be charging as fast as usual.
devhen said:
EDIT: I let it sit there and charge for about an hour or so (with the screen flickering) and I was finally able to get it booted. It said it only had 3% battery but now it seems to be charging as fast as usual.
Click to expand...
Click to collapse
Yup... I've let mine sit there turned off and charging over night... helped!
Just had a problem with the Nexus 7 not charging when battery was likely fully depleted. Putting a charge cable in was automatically booting the Nexus 7 up and wouldn't charge shutting down right after. Loops going on and off. What I did was plug a charge cable in and hold power+both volumes and now I believe I am charging at the bootloader screen. It stays on so I will leave it like this and if it doesn't resolve the issue I will try recovery once it is charged.
I've just started having the same issue. Has happened twice when battery gets to 8%, suddenly jumps to 0, shuts down, then after a few seconds restarts itself. Gets to home screen for a few seconds, battery showing 8, then jumps to zero, switches off and has flickering blocks on screen with static noise. This keeps repeating, only way I have found to solve it is to load into bootloader, then select power off. Device charges normally then and once charged works fine. I am unlocked and rooted but running stock 4.2.1, think I'll just have to return it for a warranty claim.
Based on what you experienced, the lesson here is your device can't handle the GPU over clock of more than 446mhz or it will do some crazy stuff.
Sent from my Nexus 7 using xda app-developers app
every now and then when i pull my Verizon S4 out of my front pocket (screen off), it seems locked up when i try to wake it. sometimes the bottom buttons are lit up (menu, back) but the phone is unresponsive. i hit the power button a few times, or hold it for a while, press home, or whatever, and it generally reboots eventually. any idea what could be going on?
could this be a samsung sensor that it is in my pocket? i don't think it has ever happened outside of my pocket, but is has happened 3-4 times now.
it never feels warm, so i don't think it is overheating. i have a TPU case, so i don't think the power button is getting hit (although maybe it is).
i'm on Beans 6 with the KT kernel, but i think (i'm not positive) that it happened even when on stock.
Iv had very similar problems, and have been doing some reading, and it looks like it could be battery related... some one on another forum (could be this one cant remember) said that they had the same issue with there stock battery... I have just replaced my battery yesterday, ill post back later 2day\2moro.
For me when it was in this locked up mode and i connected the charger, the state of the phone was like it was fully off, the green battery charging icon would be shown on the screen, and then i could use the power button to turn the phone back on.
francis1987 said:
Iv had very similar problems, and have been doing some reading, and it looks like it could be battery related... some one on another forum (could be this one cant remember) said that they had the same issue with there stock battery... I have just replaced my battery yesterday, ill post back later 2day\2moro.
For me when it was in this locked up mode and i connected the charger, the state of the phone was like it was fully off, the green battery charging icon would be shown on the screen, and then i could use the power button to turn the phone back on.
Click to expand...
Click to collapse
interesting. let me know what you find.
since this is happening when m phone is asleep (unlike many complaints about it happening when using specific apps) I am curious if it may be related to my KT kernel tweaks, which i copied from an expert, and which set certain CPU parameters to save battery when the phone is asleep. i'm going to try reverting those to default, or maybe try a different kernel.
Hey Mate, so far the phone has been real solid, iv had no lockup or anything with this new battery... still could be coincidence.. but its working great!
I was using my phone one day and the screen turned all green. I had to force my phone off, and then I turned it back on. After awhile it happened again, but it wouldn't turn on again. I pulled the battery and I could turn it back on after that. It happened again and now I cannot turn my phone on no matter what. I feel like it has a problem with the battery because pushing on the battery while turning it on helps has worked in the past, but it doesn't anymore. My phone also wont charge. Does anyone know how to fix this?
It could be your battery. Or it could be the motherboard. The screen going green and the shutting down could indicate a problem with the GPU and the safety circuits kicking in to prevent other damage to the phone.
I know this isn't much help, but my phone regularly goes green (almost like night vision) in extremely bright environments (like at the beach when its sunny). I just presumed it was a feature to help visibility as it really does help hugely... Maybe Im wrong!
Anyways, get a new battery and see if that works.
The screen is supposed to get brighter (if auto-brightness is enabled) in sunny environments, but not green.
Are you using a custom rom?