Database Users

Tablet on, screen backlight on, no display, HDMI out working

LTL, but I have an issue now and search isn't helping.
So, I have had my AT for about 3 weeks. No problems. Forgot to charge it overnight, no big deal. Charged it for several hours and then turned it on. Nothing. The screen lights up, but there is nothing on it. Ok, says I, I restart it. Nada. I did the hard restart (10 seconds holding the power button, 2 seconds off, 10 seconds holding it again) and still nothing. Then I noticed it made noise if I touched something that makes noise. I plug in an HDMI, and low and behold, the tablet is working fine, the screen just isn't. Now, keep in mind that the backlight is on, the screen just doesn't display anything. Any ideas?

Good2BCh13f said:
LTL, but I have an issue now and search isn't helping.
So, I have had my AT for about 3 weeks. No problems. Forgot to charge it overnight, no big deal. Charged it for several hours and then turned it on. Nothing. The screen lights up, but there is nothing on it. Ok, says I, I restart it. Nada. I did the hard restart (10 seconds holding the power button, 2 seconds off, 10 seconds holding it again) and still nothing. Then I noticed it made noise if I touched something that makes noise. I plug in an HDMI, and low and behold, the tablet is working fine, the screen just isn't. Now, keep in mind that the backlight is on, the screen just doesn't display anything. Any ideas?
Click to expand...
Click to collapse
If you never dropped it, then the ribbon cable connecting the screen to the motherboard probably got loose and isn't making a proper connection. Your choice is to RMA or try taking it apart yourself and re-connecting the ribbon cable.

I have exactly the same issue. I wish i can tear apart my transformer, but i don't know how.
Sent from my SGH-T959 using XDA App

martabakeju said:
I have exactly the same issue. I wish i can tear apart my transformer, but i don't know how.
Sent from my SGH-T959 using XDA App
Click to expand...
Click to collapse
There have been posts with pictures detailing the tear down steps people did to take it apart, but it can't be said for certain that the ribbon got loosen. The screen could've very well just died. I know for a fact that some LED powered screens draws power for the LED backlight from the same ribbon cable, if the Transformer's IPS screen does the same then the screen must've died cause the back light is still on indicating the ribbon cable is still in place.

frosty5689 said:
If you never dropped it, then the ribbon cable connecting the screen to the motherboard probably got loose and isn't making a proper connection. You choice is to RMA or try taking it apart yourself and re-connecting the ribbon cable.
Click to expand...
Click to collapse
Thanks I might just do that. It is case-kept and it was inside a computer bag, so even if it was dropped (I didn't, but I have a dog/cat/wife who might have bumped it ) it should have been fairly protected. I am still within my return/replacement window with Amazon, but they can only refund me due to lack of stock

I was also thinking that maybe it thinks an HDMI cable is still attached and won't put the tablet display on? I have never hooked up an HDMI cable up until this issue arose so I am unsure what my AT's screen would do when I plug an HDMI in. Does the screen turn off? Does the backlight stay on?

I don't think thats the issue...before my screen totally died, it discolored for some time...then i kinda shook my AT quite strongly, then the screen totally died. I think it is the ribbon issue.
Sent from my SGH-T959 using XDA App

martabakeju said:
I don't think thats the issue...before my screen totally died, it discolored for some time...then i kinda shook my AT quite strongly, then the screen totally died. I think it is the ribbon issue.
Sent from my SGH-T959 using XDA App
Click to expand...
Click to collapse
I think a tear-down thread has pics of the display connections, if there's a separate backlight power cable then yah, ribbon is loose.

So, after a minor teardown, I ensured all wires were re-seated, not just what I think was the power and display cables. Still nothing So, since I was still in the window of return/replacement with Amazon, I did that. But, as it is abundantly clear, the Transformer is sporadically in stock at best, I couldn't get a replacement, only a refund. Also, since I need a tablet by Tuesday at the latest, I am now the reluctant owner of a Samsung Tab. I am going to miss my microsd slot, my IPS screen, and my extra $100 bucks
Thanks everyone for the suggestions!

FYI I had a similar issue after accidentally bumping and dropping my transformer about 1 foot onto my mattress. Turned it on and backlight was on but no visual. Heard email notifications etc suggesting it was working. I haven't been able to get hdmi out working yet so didn't get to confirm that.
Amazon bought, but returned it to Asus service centre in Sydney. Got it back today with repair report stating "Reconnected LVDS cable". Presumably if the repairers knew you had disassembled it yourself and attempted to fix it they would say your warranty is void, would that be correct?

[Q] Nexus 4 wont start, but charges.

Hi.
My Nexus 4 got wet a couple of weeks ago and received the red light of death. I assumed it was the battery that was the issue and ordered a new one. When I replaced the battery the red light of death was gone and the display showed me the charging icon when I plugged it in to the wall.
When the battery was fully charged I pushed the start button, but the phone wont start!
I have taken apart the phone completely and dried all the parts in rice. The main board and everything looks fine, but as I said, it wont start.
Does anyone have a suggestion what the issue can be and what tricks I can try?
I miss my nexus...

Try volume down + power to get into the bootloader. Anything?

then
Chromium_ said:
Try volume down + power to get into the bootloader. Anything?
Click to expand...
Click to collapse
No, that didnt do it either. But I found a cheap used Nexus 4 with a smashed screen today. Bought it and took the motherboard from that one, and voilá! Now it works again.
So the problem was the motherboard.

Nexus 7 won't turn on

My wife's Nexus 7 suddenly won't turn on... It still had juice when she went to charge it, but the next day found it was totally dead.
I've tried different chargers, tried to get to the bootloader, opened it and unplugged the battery, hooked it up via USB to my computer, etc and nothing will get this thing to power on.
Any ideas?

Bozz5384 said:
My wife's Nexus 7 suddenly won't turn on... It still had juice when she went to charge it, but the next day found it was totally dead.
I've tried different chargers, tried to get to the bootloader, opened it and unplugged the battery, hooked it up via USB to my computer, etc and nothing will get this thing to power on.
Any ideas?
Click to expand...
Click to collapse
I mean, how long did you leave it on AC power? I know when I drain mine since coming to KitKat, it takes as long as a half an hour to respond again.

kcipopnevets said:
I mean, how long did you leave it on AC power? I know when I drain mine since coming to KitKat, it takes as long as a half an hour to respond again.
Click to expand...
Click to collapse
Sorry, it spent more than a day on the charger. Still nothing, cannot get it to respond at all.

Bozz5384 said:
Sorry, it spent more than a day on the charger. Still nothing, cannot get it to respond at all.
Click to expand...
Click to collapse
If you haven't already, try holding the power button for a while until *hopefully* the Google splash appears.
A good way to tell if the device is accepting a current is by using a charger that can verify this somehow, like with an embedded LED. One like this: http://www.verizonwireless.com/accessories/rapid-wall-charger-with-6-ft-cable-for-micro-usb/
I used this for my HTC Rezound when it still worked to make sure it was taking a charge because it would report it was charging in the OS but the charger module itself reported otherwise (the red Verizon ring didn't illuminate unless the charger was positioned a certain way in the device thus this was the only way I could supply it a charge and not hope it wasn't dead in the morning). When my Nexus 7 is drained, it draws enough voltage to get the charger to illuminate so maybe try one of these to really make sure it's still responding.
For the meanwhile, if you do decide to buy one, what was the last thing you/your wife had done? Was there root access?

U need press power for 2 min and need to be pluget into wall
Sent from my Nexus 7 using XDA Free mobile app

kcipopnevets said:
If you haven't already, try holding the power button for a while until *hopefully* the Google splash appears.
A good way to tell if the device is accepting a current is by using a charger that can verify this somehow, like with an embedded LED. One like this: http://www.verizonwireless.com/accessories/rapid-wall-charger-with-6-ft-cable-for-micro-usb/
I used this for my HTC Rezound when it still worked to make sure it was taking a charge because it would report it was charging in the OS but the charger module itself reported otherwise (the red Verizon ring didn't illuminate unless the charger was positioned a certain way in the device thus this was the only way I could supply it a charge and not hope it wasn't dead in the morning). When my Nexus 7 is drained, it draws enough voltage to get the charger to illuminate so maybe try one of these to really make sure it's still responding.
For the meanwhile, if you do decide to buy one, what was the last thing you/your wife had done? Was there root access?
Click to expand...
Click to collapse
Interesting about the charger -- don't think I have one that does that. Maybe I'll see if my VZW store has one, not sure yet.
She had just used her tablet as normal, and plugged it in like she does every other day or so -- the next morning grabbed it and went to work only to find out that it was dead. IE: not turning on.
- No root access (totally stock)
- I've tried holding the power button for up to 2 mins. - nothing
- Even tried holding the down volume and power for up to 2 mins. together - nothing
- Removed the back and unplugged the battery (plug was really tight) and left it undone for 5 mins and reconnected - nothing
- When plugging in to a USB on the computer, the computer dings like I connected something but - nothing
Perhaps I'll take it apart again and see if I can get a voltage reading on the battery with my multimeter... didn't do that before, but would be good to know if it is charged and not turning on or what.

Bozz5384 said:
Interesting about the charger -- don't think I have one that does that. Maybe I'll see if my VZW store has one, not sure yet.
She had just used her tablet as normal, and plugged it in like she does every other day or so -- the next morning grabbed it and went to work only to find out that it was dead. IE: not turning on.
- No root access (totally stock)
- I've tried holding the power button for up to 2 mins. - nothing
- Even tried holding the down volume and power for up to 2 mins. together - nothing
- Removed the back and unplugged the battery (plug was really tight) and left it undone for 5 mins and reconnected - nothing
- When plugging in to a USB on the computer, the computer dings like I connected something but - nothing
Perhaps I'll take it apart again and see if I can get a voltage reading on the battery with my multimeter... didn't do that before, but would be good to know if it is charged and not turning on or what.
Click to expand...
Click to collapse
Remove the back cover, locate the plug to the battery, disconnect plug by sliding from right to left, then replug. Should be fine after that.

player90247 said:
Remove the back cover, locate the plug to the battery, disconnect plug by sliding from right to left, then replug. Should be fine after that.
Click to expand...
Click to collapse
Thanks but I already did that. Nothing changed. If I don't get it going soon I'll be forced to buy something else as she is getting impatient.

I have the same issue.
I bought a refurbish one and it was working great for 2 days and yesterday when I tried to open it, it won't turn on anymore and I was able to browse on it 5 min before.
I tried everything but I cannot find any solution...
When I plug into a wall I cannot see the charging icon and when I plug it into my computer it will do the noise that a device is plug but nothing happen... I wonder if its the battery that is crap

pacostrano said:
I have the same issue.
I bought a refurbish one and it was working great for 2 days and yesterday when I tried to open it, it won't turn on anymore and I was able to browse on it 5 min before.
I tried everything but I cannot find any solution...
When I plug into a wall I cannot see the charging icon and when I plug it into my computer it will do the noise that a device is plug but nothing happen... I wonder if its the battery that is crap
Click to expand...
Click to collapse
I own 3 of these N7 tablets and this has been the number one issue. Sent one for repair when it was under warranty. The supplied Nexus wall charger burn out quick, and aftermarket cables last only 3 months. I've had better results using the Samsung wall charger and cable.

OP, it sounds like your wife's N7 is in APX mode. Connect it to your PC via a USB cable, and open Control Panel's devices and printers panel. If it sees an APX device, and you didn't make NVFlash blobs, your only recourse is a motherboard replacement.

exglynco said:
OP, it sounds like your wife's N7 is in APX mode. Connect it to your PC via a USB cable, and open Control Panel's devices and printers panel. If it sees an APX device, and you didn't make NVFlash blobs, your only recourse is a motherboard replacement.
Click to expand...
Click to collapse
Well, that sounds interesting. Tell me more about the APX device thing. I didn't quite understand.

new nexus 7 2012
Me0211 said:
Well, that sounds interesting. Tell me more about the APX device thing. I didn't quite understand.
Click to expand...
Click to collapse
I just got my new N7 32gb GSM 2012 in the mail today. Won't turn on at all. I'm not going to bother. Going to return it. Quite disappointed, as I didnt realized this issue (apparently with the battery) was so common. Was looking forward to flashing cyanogenmod. Poop. Might just get a samsung tab now, which I think is quite overpriced for its specs.

horsegold said:
I just got my new N7 32gb GSM 2012 in the mail today. Won't turn on at all. I'm not going to bother. Going to return it. Quite disappointed, as I didnt realized this issue (apparently with the battery) was so common. Was looking forward to flashing cyanogenmod. Poop. Might just get a samsung tab now, which I think is quite overpriced for its specs.
Click to expand...
Click to collapse
If you're seriously looking for something other than an N7 then I'd suggest you look at the LG G-Pad.
I bought one for my Dad at Christmas and was amazed by how good the screen is, and the tablet generally, for the price. The LG skin is minimal and can be changed obviously with another launcher, and the battery life is better than my N7.

Nexus 4 Random turn offs?

Hey guys.
Basically I've recently replaced my whole screen assembly on my Nexus, but it turns off after a few seconds when it's not on charge.
Sometimes it'll last about a minute but will instantly turn off. I've tried a factory reset and it still does the same thing.
I've bought a replacement battery, just making sure that there's nothing else wrong with the phone? any advice etc would be appreciated.
Thanks.

If it started after you replaced the screen, then its likely that something isn't seated properly on the inside. I changed my screen too, so have a look at the battery connector and the connector that connects the bottom board (the one with the charger port) to the top one.

raze599 said:
If it started after you replaced the screen, then its likely that something isn't seated properly on the inside. I changed my screen too, so have a look at the battery connector and the connector that connects the bottom board (the one with the charger port) to the top one.
Click to expand...
Click to collapse
It was doing it before I changed the screen.

Rebdomine said:
It was doing it before I changed the screen.
Click to expand...
Click to collapse
In that case it probably is the battery. New one should fix it.

Help! Battery drained, phone won't turn on, battery charging icon flashes on and off?

My phone had been working perfectly fine, as well as charging perfectly fine. Recently, I accidentally let it drop to 0%, which I don't usually do. I went to plug it into the same wall outlet as always, but instead of the usual charge process, the battery icon with the lightning bolt in the middle simply flashes on the screen and then turns off, which happens over and over again.
It should be noted as well that about 3 weeks ago my phone get fairly wet. After that incident, I turned it off till it dried, powered it up, and everything appeared to be totally ok. No problems since then until this.
Other facts:
-I can safely get into the recovery menu (power + vol down), which is stable, but any menu selections result in the Motorola splash screen for a quick second and then the phone powering down.
-The computer will recognize the connection to the phone.
Attempts to resolve:
-New cable, new usb hub, new wall outlet
-Trickle charge from the computer (same flashing)
-Phone in rice to remove moisture
-Toothbrush cleaning of Micro-usb port (suggestion from another thread)
I'm pulling my hair out, and I am considering prying off the back and replacing the battery. I have searched other threads, but have seen various solutions none of which worked for me. If anybody has any idea how I can fix this please help!!!
Thanks in advance.

Unfortunately most probably is the hardware problem. I had similar issue with razr. Splashed it on the beach, quickly washed with tap water, dryed it and for couple of days like nothing happened. Then suddenly digizer stopped working. It was motherboard. Luckily one xda member donated me the same phone with broken screen so I replaced motherboard by myself.
Sent from my LG-V940n using Tapatalk

Zeljko1234 said:
Unfortunately most probably is the hardware problem. I had similar issue with razr. Splashed it on the beach, quickly washed with tap water, dryed it and for couple of days like nothing happened. Then suddenly digizer stopped working. It was motherboard. Luckily one xda member donated me the same phone with broken screen so I replaced motherboard by myself.
Sent from my LG-V940n using Tapatalk
Click to expand...
Click to collapse
Thanks for the suggestion. Well, I got it back working again, by charging it for 5 hours straight and then not charging it for an hour. Now it appears to be functioning alright, with the exception that it once went from 40% bat to 15% to 0% in a matter of seconds and I had to repeat the procedure to get it back on. I have another turbo with a broken digi that I could cannibalize but I have no idea what to replace... the battery? Bizarre issue, but I guess that comes with the territory of water damage.

Maybe some part is still wet. If another Turbo has only broken screen, then is probably the easiest solution to take screen from the (ex)wet and put to another one. You just have to have proper screwdriver.

Replaced battery now Droid turbo flashing when I charge?