[Q] Dead backlight? - EVO 4G General

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.

Related

universal dead?? HELP red light!!!!

Hello, earlier today i felt the device was very warm, i tried to switch it on but it dint respond, even to a reset. when i plugged it into the wall charger all i get is the right hand LED glowing red.
HELP!!!!!!!!!!! how do i hard reset it or get it to work again!!!!!!
i would call in orange care, but im out of the country and i really need the pda functionality!!!!
Unlucky. The 'red' light on most HTC devices indicates a serious power problem, usually it means that the battery is dead (as opposed to simply having run out of charge) or very close to death. You can probably get it working again with a new battery, if the incident hasn't damaged any other components.
i had this with my JJ after I accidently let the battery run down, I plugged it in and led went red and unit would not power on, left it plugged in started scanning the manual and web about a red led, 30 mins later, JJ just switched on and all fine.
It's worth a go and ive not had problem since
i dont think that was the case...
i have a feeling it might have been a short or something, because the unit was SERIOUSLY hot.....
nothing i did worked....until............
final time before giving up, the light was still red etc.
i figured what the heck, either way its dead and im going to get a replacement.
i then gave it fairly hard thump
the red light disappeared. i thought to myself, oh crap, i've really killed it.
then i reset it............. IT BOOTED UP!!!!!!!!!!!!!!!
and all my info still intact......brilliant.....im still going to try and get a replacement when i get back, but thank goodness.
and here i was thinking the last computer to respond to physical violence was the old 486'es hehehehehe
afhstingray said:
and here i was thinking the last computer to respond to physical violence was the old 486'es hehehehehe
Click to expand...
Click to collapse
Actually, it's called percussive maintenance, "the fine art of whacking a machine till it works"
hehe, i'm an IT technician and it's the first thing i try, especially with Printers.....
They don't teach you that on MSCA courses.....
I would recommend not using the machine too much until you can get a replacement battery if I were you. Lithium batteries will get very very hot (in some cases expand and ignite) if they are dis-charged too far. Most equipment which uses lithium technologies will have a voltage cut-off on the power input. As each cell is a nominal 3.3V-3.6V, this is often at around 3V in order to not discharge the battery too far. I would have hoped that this was a HARDWARE function rather than software. However with what you have described, if the voltage cutout was somehow disabled, then this could explain the problems.
Of the units that I have seen in the past like this, the red LED would describe the battery voltage being too low to safely power the unit (i.e. battery be dead). Generally a couple of minutes charge will bring it up to a safe working value. However, after 30 minutes this certainly should have been enough. On one of my motorola units, the battery has expanded a couple of millimeters as it starts to dissociate. It may be worth you checking to see whether the battery in your universal has distorted in any way.
Hmm the red light comes on mine all the time.
It just means the battery is low and the unit is charging. .
It should turn green when the battery is at or near optimum charge.
no....thats not the red, charging is orangy when i say red i mean PROPER red. battery is not distorted, and to the best of my knowledge the unit had a good charge, im pretty sure it must have been some kind of hardware short, and am going to call orange as soon as im back in the country.
dosent explain though why when i whacked it it started working again. the whack instantly made the light go out :wink:
i did a battery rundown test as soon as i got the unit, and posted the results on the forum, if the cut off was not working, i would have ended up with a red light then.
i dont have the manual with me now, but is there any documentation on the red light?
Found this site which had an online manual:
http://www.rich-michael.com/pdf/User Manuals/050802_Universal_Generic_Manual_English_CDL.pdf
What does the phone say in the Power Tab?
A really useful extract:
13 Notification LED Bi-color LED on the right side: Green and Orange
for GSM/WCDMA standby, SMS message, GSM/
WCDMA network status, notification, battery charging
status.
Bi-color LED on the left side: Blue andGreen for
Bluetooth system notification of powered-up and
ready to transmit radio frequency signal, and Wi-Fi
status.
Couldn't find anything else on the LEDs
Found this site which had an online manual:
http://www.rich-michael.com/pdf/User Manuals/050802_Universal_Generic_Manual_English_CDL.pdf
What does the phone say in the Power Tab?
A really useful extract:
13 Notification LED Bi-color LED on the right side: Green and Orange
for GSM/WCDMA standby, SMS message, GSM/
WCDMA network status, notification, battery charging
status.
Bi-color LED on the left side: Blue andGreen for
Bluetooth system notification of powered-up and
ready to transmit radio frequency signal, and Wi-Fi
status.
Couldn't find anything else on the LEDs
Sorry to drag up this old post.
My friend dropped my phone (Orange SPV C500) a few days ago on to a tiled floor. The phone didn't appear to be broken or faulty at all at the time. I even managed to use TomTom navigator to go to the airport, but for some reason when I looked at it before I went to sleep, the phone was off. I assumed the battery had gone (even though it should have lasted at least another day). I tried to plug in the mains charger, but the LED showed a red light. I left it plugged in while I slept, but it was the same in the morning. The phone won't power on at all. I've read that this normally happens on a flat battery, but I am pretty sure it still had juice for another day.
I brought a new battery, but to no avail, the phone still shows the red light when plugged into the mains. No light at all when plugged via USB to my computer. The phone won't power on at all.
It must have broke something when it was dropped. But I'm confused as to why it took a few hours to take any effect.
I also notice that even without the battery in the phone, the LED will still light up as red when plugged in to the mains.
I've tried whacking the phone now, but nothing. Anyone have any idea whether it can be fixed?
JOEJOETHEJOEY said:
Sorry to drag up this old post.
My friend dropped my phone (Orange SPV C500) a few days ago on to a tiled floor. The phone didn't appear to be broken or faulty at all at the time. I even managed to use TomTom navigator to go to the airport, but for some reason when I looked at it before I went to sleep, the phone was off. I assumed the battery had gone (even though it should have lasted at least another day). I tried to plug in the mains charger, but the LED showed a red light. I left it plugged in while I slept, but it was the same in the morning. The phone won't power on at all. I've read that this normally happens on a flat battery, but I am pretty sure it still had juice for another day.
I brought a new battery, but to no avail, the phone still shows the red light when plugged into the mains. No light at all when plugged via USB to my computer. The phone won't power on at all.
It must have broke something when it was dropped. But I'm confused as to why it took a few hours to take any effect.
I also notice that even without the battery in the phone, the LED will still light up as red when plugged in to the mains.
I've tried whacking the phone now, but nothing. Anyone have any idea whether it can be fixed?
Click to expand...
Click to collapse
this is damn scary! Every day more people add on to the "my univ's gone dead after a small drop" community :?
When my univ was brand new, a friend of mine dropped it from a coffee bar table 3 feet high, and i still heave a sigh! Cant believe nothing happened...!
But one thing i guess we all know, its a "drop" away to kiss our device good bye :roll:
hope you get it back up and running m8! look around the forums, there are lots of breakdown-solutions threads...
cheers,
San
nice work afhstingray
do you think it was a baterry problem.
i have often used my battery till tit just ran out, from what i read in the post it seems to be a bad practice. anyway to turn off the phone
i doubt it was a battery problem as i've been using it until now without problems. (i didnt get a replacement as soon as i got back cos im waiting for this unit to get a bit scruffy before i get it replaced)
i had this once on my c500 as well, but taking out the battery for an hour did the trick. so i dont think the problem is related.
i've dropped my universal quite a few times already and im happy to say other than a few annoying dings on the metal plate with the orange logo, its working fine. and 2 of the drops were pretty bad ones too, i thought for sure the screen would die or crack. guess i got lucky and it hit the floor at an angle not too critical
total stab in the dark but maybe a broken connection on charging circuit? that could be why phone was ok then battery died and its now unable to charge?
ViaraiX said:
total stab in the dark but maybe a broken connection on charging circuit? that could be why phone was ok then battery died and its now unable to charge?
Click to expand...
Click to collapse
wouldnt it have worked if it was plugged into the AC then?
Well my Exec was dropped onto concrete at the petrol station whilst I was trying to sort out TomTom and fill up my Yamaha R6 bike at the same time :roll:
No problems, just a couple of case marks.
I guess multitasking should be left to the ladies and computers :lol:
steverae said:
hehe, i'm an IT technician and it's the first thing i try, especially with Printers.....
They don't teach you that on MSCA courses.....
Click to expand...
Click to collapse
Also explains why Servers are built so solidly.
When you are trying to recover a server at 2am in the morning they need to stand up to all but a sledgehammer :twisted:

HTC Touch help, cant turn on phone

hey guys i need a little help, everything was working fine and then i turned the phone off and then turned the phone back on. All it did was go to the screen smart mobility and then shuts back down. Any clues ?? i just cant turn it on anymore.
i have the same problem
I turn on with a new rom my elfin and now does not turn un
Make sure your battery is fully charged. Try turning it on plugged in. Try using a different battery if you have one - If you don't have another battery and the one you have is old, it may need replacing. Turning on and then shutting off sounds like battery problems to me
I have another HTC Touch with a very similar problem. I think mine is due to minor water damage though (water balloon hit my pocket, unlucky huh?). It's been dead for about 4 months. It "MIGHT" turn on after a few weeks leaving it alone, then reach Smart Mobility screen and then turn off... permanently for a few weeks.
When I normally try to turn it on, I can hear a distinctive high-pitched noise coming out of the back, it'll stay like that until I rip the battery out.
Every few weeks I hope to get it booted long enough to maybe flash a new ROM, or IPL/SPL. I don't know what to do with it. Maybe some boot file or the hard drive corrupted due to the water damage. No light, no response from other batteries, no light via USB cable, just a slight high pitched noise. To this day, it is still dead.

Nexus 7 keeps turning off at random intervals

This has been going on for about a week or so.
At first I kept finding it off in the morning after charging, and then it became more common. Mostly happens when the screen is off but not always, I've had it turn off twice whilst I'm using it for example. A couple of times it has needed a long press to restart it before it will turn back on. Right now it has turned itself off and will not turn back on.
Battery has never fallen below about 50% throughout so it cant be that. It doesn't get heavy use so I'm not convinced its overheating. I had a look through the app list and none of them seem to be obvious candidates for the problem, and if i cant get the thing to turn back on I cant even test that.
I think this one is going back to HMV asap but I was wondering if anyone has any ideas for me to avoid the problem with its replacement, or if anyone is having the same problem. Its a shame as I've been really enjoying my Nexus.
Clem
clem2k3 said:
This has been going on for about a week or so.
At first I kept finding it off in the morning after charging, and then it became more common. Mostly happens when the screen is off but not always, I've had it turn off twice whilst I'm using it for example. A couple of times it has needed a long press to restart it before it will turn back on. Right now it has turned itself off and will not turn back on.
Battery has never fallen below about 50% throughout so it cant be that. It doesn't get heavy use so I'm not convinced its overheating. I had a look through the app list and none of them seem to be obvious candidates for the problem, and if i cant get the thing to turn back on I cant even test that.
I think this one is going back to HMV asap but I was wondering if anyone has any ideas for me to avoid the problem with its replacement, or if anyone is having the same problem. Its a shame as I've been really enjoying my Nexus.
Clem
Click to expand...
Click to collapse
Hi, I had the exact same problem and ordered a replacement from the play store. I never found a way to fix it, I would recommend you just get a new one from HMV. I hope this helps
This actually just started happening to me yesterday on my 3 day old 16GB Nexus 7. I kept mine plugged into the AC all weekend, and yesterday watched it shut down itself once. Thought it was a fluke and just turned it back on...left it running overnight...pick it up this morning and it's turned itself off yet again. I guess I'll have to return this one before it completely doesn't turn on anymore!
Bah. Thought that might be the case.
2 days off charge (and some time on charge) and mine still wont turn on.
Definitely going back for replacement.
Elsydeon, it sounds like you should do the same. Took about 4 or 5 days to go from irregular to brick.
I seem to be getting the same thing... Once every day or two I pick up my Nexus and the screen won't turn on, I hold the power button and it starts booting up. I haven't had this while charging (maybe because the screen is on while charging??)
For those of you who traded in for a replacement, did this solve the issue for you?
I was getting this, but was using one of those magnetic cover/cases. If I wrap the cover round the back of the N7 whilst using it, the magnet in the case/cover is sometimes strong enough to turn the device off from the back!
Mine has powered off twice now
clem2k3 said:
This has been going on for about a week or so.
At first I kept finding it off in the morning after charging, and then it became more common. Mostly happens when the screen is off but not always, I've had it turn off twice whilst I'm using it for example. A couple of times it has needed a long press to restart it before it will turn back on. Right now it has turned itself off and will not turn back on.
Battery has never fallen below about 50% throughout so it cant be that. It doesn't get heavy use so I'm not convinced its overheating. I had a look through the app list and none of them seem to be obvious candidates for the problem, and if i cant get the thing to turn back on I cant even test that.
I think this one is going back to HMV asap but I was wondering if anyone has any ideas for me to avoid the problem with its replacement, or if anyone is having the same problem. Its a shame as I've been really enjoying my Nexus.
Clem
Click to expand...
Click to collapse
Just wondering as well like the last guy if swapping for a new one helped this issue.
I actually have looked at the battery data and think somewhere the nexus has gotten a power spike that turns it off but not sure if that definitely is the issue.
If it is, perhaps it's where we are plugging in or a failure with the AC plug?
Ideas? I've attached a photo. I hope it uploaded.
Thanks.
nyhunter77 said:
Just wondering as well like the last guy if swapping for a new one helped this issue.
I actually have looked at the battery data and think somewhere the nexus has gotten a power spike that turns it off but not sure if that definitely is the issue.
If it is, perhaps it's where we are plugging in or a failure with the AC plug?
Ideas? I've attached a photo. I hope it uploaded.
Thanks.
Click to expand...
Click to collapse
I have exactly the same issue, taking it back to pcworld.
Ian Morrison
HTC OneX, G-Tablet www.smokecig.co.uk
Me too
unless i hear different from anyone here, going to exchange it for a new one today ... only been 2 weeks from Staples.
Actually going through the data, it's happend the last 3 days now.
I wake up to the white battery symbol.
By the way, for future ref, is bootloading warranty killing? I am in the process or restoring now just in case.
Thinking of getting their replacement plan now too because of this episode.
Thank goodness for titanium backup
Nexus 7 32GB Display Keep Turning Off
My Nexus 7 32GB tablet's display continues to turn off at random times also. It happens while I'm watching a video in landscape. But then I stop the video, go to the home screen, and it still turns off. I already replaced one last week and now its happening to my new one. Anyone got answers? I'm going to call google device support today. Maybe if enough people call, they'll do something about it. Their # is 888-836-3987.
Still happens
Otoniel76 said:
My Nexus 7 32GB tablet's display continues to turn off at random times also. It happens while I'm watching a video in landscape. But then I stop the video, go to the home screen, and it still turns off. I already replaced one last week and now its happening to my new one. Anyone got answers? I'm going to call google device support today. Maybe if enough people call, they'll do something about it. Their # is 888-836-3987.
Click to expand...
Click to collapse
My NEW 32 tab worked out fine for a night and woke up today to the full battery indicator and tablet off again.
I have a new insight though, somehow the battery temp is rocketing to 100 and I'm guessing that is when it shuts off.
It may be because I am using SetCPU to limit my CPU speed to 300mhz when the screen is off. Maybe the tablet is trying to update all my apps while I am sleeping? It shouldn't use so much power though.
I'm going to try to create a new command to let it use it's whole CPU as long as it's on AC and screen off and see what happens tonight.
Happened overnight again. No insights? Does anyone think my nexus will finally brick sometime?
I don't know anyway of testing what is up with this thing? Thanks.
Nexus 7 Screen Keeps shutting off - Fixed
To those experiencing issues with their Nexus 7 screen randomly shutting off.
I just received one for Christmas, and thought this dang thing sucks. The screen would stay off and only show for half a second when I click the lock button to turn it back on.
The issue what the case. The the case, when folding back, contains a small piece of metal on the click. This little connection, thought not direct, causes the screen to shut off. I've tested it out multiple times just to make sure.
Again the FIX is, keep metal away from the back of the nexus, it doesn't like anything that can cause a magnetic field. Even if the metal is enclosed by something.
nexus 7 screen turns off
For those of you who are experiencing intermittent screen display going to sleep mode or turning off you can fix it by removing your tablet cover. Some third party tablets come with different strength magnets stitched inside the cover. The magnet is used to activate the nexus tablet smart cover functionality. If you flip the cover to the back of the tablet the magnetic field may cause the tablet to think it should turn off while in use. Get rid of your cover reboot your tablet and notice that the screen will stop turning off. Hope this helps.
Hi, I also had similar problems with my Nexus 7. After removing the back of the unit, I saw that the battery was nearly unplugged. I simply popped the connector in and voila! no more SOD, turning off, nothing.
So, the Nexus was probably turning itself off because there was randomly no more power comming from the battery.
Here's a link on how to remove the back shell : http://www.ifixit.com/Teardown/Nexus+7+Teardown/9623/1
Look at Step 4.
That Fixed It!
StefGou said:
Hi, I also had similar problems with my Nexus 7. After removing the back of the unit, I saw that the battery was nearly unplugged. I simply popped the connector in and voila! no more SOD, turning off, nothing.
So, the Nexus was probably turning itself off because there was randomly no more power comming from the battery.
Click to expand...
Click to collapse
I was researching before going to get my Nexus 7 replaced today as it also started having this issue. After reading your post, I took your advice and removed the back to find that my battery connection was also barely intact! Thus it would lose power any time it was bumped slightly to that side. Now that the connection is securely in place, I've had no more problems!! Thanks to you StefGou!!!
Hey guys. A few hours ago I encountered the same said problem. I woke up to find the battery was depleted so I charged it. It turned on by itself and stated that I have 6% battery left. As I wait, suddenly the screen was like distorted and give me static sound then shut off. Numerous trials later end up the same. So I just put on the charger thinking to let the battery full. To my surprise, there was no indicator that my N7 is charging. I just leave it charging and left. About an hour I got back it still nit charging. I boot the N7 and it still on 6% battery. So I followed you guys handsomely instructions to remove the 3rd party cover and now my N7 is back. Thanks guys. But I wonder why it is happening now? I've been using the cover since forever.

Nexus 7 random reboot, screen jamming, making noise

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

[Q] I9505 died suddenly now wont charge

Hi all, tried searching for some help but couldn't find anything of any use, plenty of similar things only but not quite the same.
Basically, my phone had been in use today, as normal, nothing different, nothing new installed. I put it down on the table while I did some work around the house, an hour late I picked it up and it was off. It had around 70% power when I last looked at it, Not only had it turned off, it was so hot I couldn't hold it for more than a moment. After letting it cool down, I tried to turn it on and nothing at all happened. I decided to plug it in and leave it to charge a bit, but when I came back to it again half an hour later it was still dead and hot as hell again.
I have tried three different chargers and even a new battery that I bought in town just this morning, thinking the battery was the problem. Still exactly the same thing happening with new battery, wont charge, phone heating up within minutes to the point where I cant hold it. Heat seems to be building up underneath the memory card slot.
I did manage to boot it up briefly whilst it was plugged in before it got too hot but had to turn it off again to cool it down. It seemed to boot just fine on that occasion. Also managed to get it into recovery and did a cache wipe as well as a full factory wipe but no difference. Again I managed to boot it after the wipe, seemed to start up as you would expect a first boot to do, asking me to set up the phone, but again it was no gaining charge and was heating up very fast so had to turn it off again.
Any ideas what the hell has gone wrong with me phone?
I have a repair pack from Samsung on route as its only four months old, so they will do a warranty repair or a swap, but while I'm waiting, thought it best to ask here if anyone has any ideas.
Sorry for such a long post, if I need to post anything more specific feel free to ask.
Thanks in advance
I experienced such before...
Phone heats up a lot and shuts off when charging. I send the phone in for repair, the service center identify it as faulty motherboard and got a replacement handset...
It is just bad quality components in Galaxy S4. Go and change your phone at service center.
Thanks for that, I had a feeling it was motherboard, processor or USB board, Was kind of hoping I was wrong and there was something I could do at home to fix it but oh well...
Does it matter that I have the new German 4.3 firmware on a UK handset with multi-csc? Knox flag is still 0x0 if that matters to warranty lol. I cant flash anything stock if I cant turn the thing on lol.
Why is the S4 such a poor quality phone for a flagship, seems to be so many faults with the phone and battery. I've had both the cracked screen issue as well as this crash for no reason. My S2 on the other hand is still going strong and working perfectly despite being dropped a few times and having had no new parts or battery replaced. Its covered in marks and dents from prolonged use and still keeps going. Had that since launch. Back to using it while waiting for the four month old S4 to be fixed.
EDIT:
Strange new development, the original battery doest do anything any more. Nothing happening at all, no charging screen, no heating up, nothing. New battery still not charging and causing phone to heat up. Did manage to boot the phone up again for a few minutes last night and besides heat and not charging, it seemed to work. Making me think its not the motherboard at fault now or surely it wouldn't turn on. No idea what's going on now.

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