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[Q] Completely unresponsive Xoom

I've got a 4G Xoom, that I bought new about 13 months ago. It's been great to me so far. I had it rooted and was running CM 9 on it and had been doing so for about a month without any issues.
Yesterday, it was plugged into the charger and I happen to glance at it and it was doing some strange things with the screen, flashing on/off, black lines on part of the screen. I powered it off and left it alone for an hour or so.
Since then, it's been completely unresponsive. I've tried Vol Up+Power button countless times without it working. The charge light (white) came on briefly while plugged in, but then went off, never to return. The only reaction I can get is that after holding Vol up+Power causes an orange light next to the front camera to blink twice. That's it.
Any suggestions? Is it completly dead?

danman7 said:
I've got a 4G Xoom, that I bought new about 13 months ago. It's been great to me so far. I had it rooted and was running CM 9 on it and had been doing so for about a month without any issues.
Yesterday, it was plugged into the charger and I happen to glance at it and it was doing some strange things with the screen, flashing on/off, black lines on part of the screen. I powered it off and left it alone for an hour or so.
Since then, it's been completely unresponsive. I've tried Vol Up+Power button countless times without it working. The charge light (white) came on briefly while plugged in, but then went off, never to return. The only reaction I can get is that after holding Vol up+Power causes an orange light next to the front camera to blink twice. That's it.
Any suggestions? Is it completly dead?
Click to expand...
Click to collapse
Open up the back take the battery out, put it back in.

Mjamocha said:
Open up the back take the battery out, put it back in.
Click to expand...
Click to collapse
Given that it's sealed, how is this done? I hadn't even considered cracking the case.

danman7 said:
Given that it's sealed, how is this done? I hadn't even considered cracking the case.
Click to expand...
Click to collapse
You may not need to remove the battery as several people have reported success with just slipping some paper between the contacts for 30+ seconds. You will need to open it up though and here's a post with info and pictures to guide you through that: http://forum.xda-developers.com/showthread.php?t=1578365
On edit: here's another thread with good info for you http://forum.xda-developers.com/showthread.php?t=1528706&page=3
Good luck.

Well, I did the paper under the battery terminals for 15 minutes and still no joy.
One item of note is that when I plug the charger in, I'm not getting a white (or green) light. At least not much of the time. Occasionally, I can wiggle the plug a bit and it will light up, but I'm not getting to green at all.
I can put a multimeter on the battery leads, does anyone know how many volts/amps I should be reading?

Are we sure that its not just a crap connection with the charging plug. It is a wimpy little pin and my Xoom needs me to do a rain dance to get it to charge. I have to plug it in, wait a few seconds and then the white light comes on , but only if the wire is flipped back over the top of the screen. Another thought is I use Tiamat ics and there is an option to have the light on or off during charge and I think it is set to off as default, maybe you didn't set that up. I would bet its something stupid and you just need to keep playing with the wire and see if you can get it on. Good luck.
Sent from my Xoom using XDA

New phone doesn't turn on

Hi
I bought my relay from ebay http://goo.gl/GbQ1Nt just started using the phone today.. I put my SIM card of a carrier from Peru and it worked just fine. Everything was running smoothly.. I was making phonecalls and texting.. I put my gmail account and started downloadign some apps..
After a couple of hours, the battery was almost dead so I plugged it..
After five minutes, the screen turned off out of the blue.. and I haven't been able to turn it on since
It won't turn on, nor enter recovery or download mode
I'm not even sure it is charging.. when i plug it the red led turns on.. but there is no other charging indicator..
I'm in Peru so returning it is a bit o f a challenge.. I was just wondering if any of you guys know what could be wrong..
Thanks

qqisa said:
Hi
I bought my relay from ebay (http://goo.gl/7v8j1Z)I just started using the phone today.. I put my SIM card of a carrier from Peru and it worked just fine. Everything was running smoothly.. I was making phonecalls and texting.. I put my gmail account and started downloadign some apps..
After a couple of hours, the battery was almost dead so I plugged it..
After five minutes, the screen turned off out of the blue.. and I haven't been able to turn it on since
It won't turn on, nor enter recovery or download mode
I'm not even sure it is charging.. when i plug it the red led turns on.. but there is no other charging indicator..
I'm in Peru so returning it is a bit o f a challenge.. I was just wondering if any of you guys know what could be wrong..
Thanks
Click to expand...
Click to collapse
The link you posted for the auction doesn't work. Wanted to check if you got it new or used. One thing I've noticed with mine is that I have to hold down the power button for a second or two to get it to turn on (seemed like it was a little bit longer than other phones I've had).
Outside of that it sounds like it might be some kind of hardware problem. Might even just be a bad battery. One thing you could try is using an external charger for the battery if you have a universal lithium ion charger or if you know someone who has one. That way you might be able to narrow it down to a problem with the charging circuit in the phone.

jgummeson said:
The link you posted for the auction doesn't work. Wanted to check if you got it new or used. One thing I've noticed with mine is that I have to hold down the power button for a second or two to get it to turn on (seemed like it was a little bit longer than other phones I've had).
Outside of that it sounds like it might be some kind of hardware problem. Might even just be a bad battery. One thing you could try is using an external charger for the battery if you have a universal lithium ion charger or if you know someone who has one. That way you might be able to narrow it down to a problem with the charging circuit in the phone.
Click to expand...
Click to collapse
thanks for replying
I've edited the link
I tried an external power bank but it didn't even turn it on.. so I narrowed it like you said to: the battery is so messed up it won't even charge or the battery is fine but the whole charging circuit is wrong.
Then I took it to an electrician and he said the battery had energy and should start the phone, but it didn't.
After that he charged the battery alone for a little bit with his "whatever kind of car-battery-like thing" but it still was not turning the phone on.
When I came home I plugged it once more to the external powerbank and some how the charging animation appeared..
I let it charge for a while but it didn't seem to progress, so i turned it on and holly crap it turned on
but after the boot animation it vibrated and turned off and now it's not charging again
man.. i thought i had it
any thoughts?
i've read about something called sticky power button.. its a hardware problem in the galaxy sII model.. could it be related?

Not sure about the sticky power button I've never had it happen to me. I would think that when you had it on it would have popped up the reboot menu like when the power button is being held down. If it were me I would contact the seller.

i returned to the electrician and he recharged a little bit more the battery..
this time it did turned on and it reached the lockscreen it said 1%
so I plugged it.. and it now stays on.. and it says charging but stays at 0%.. doesn't advance.. is it a battery issue or a charging circuit issue?
forget about the sticky power button

Moto G totally dead

Well, title says it all. My girlfriend's Moto G just went totally dead one day. I took it apart and measured that the battery voltage was very low. I also tried to charge the phone but all that it did is blinking white LED if Power button is pressed.
So, i went to eBay and purchased a new battery which arrived today. Popped it into Moto G aaand.. still no life. Even the white LED did flash no more Tried almost every single trick that I have found, still no luck, however few hours of charging with my G3 charger bring the white LED back to life. Now if I press Power button for a few seconds, white LED flashes quickly 2 times and then it goes away and nothing on screen. If I just let it charge without touching anything, I can see white LED flashing sometimes. Gonna leave it charging overnight and see if that brings it back to life. Any tricks what else I can do with this phone or should I just toss it away?

mtoivanen said:
Well, title says it all. My girlfriend's Moto G just went totally dead one day. I took it apart and measured that the battery voltage was very low. I also tried to charge the phone but all that it did is blinking white LED if Power button is pressed.
So, i went to eBay and purchased a new battery which arrived today. Popped it into Moto G aaand.. still no life. Even the white LED did flash no more Tried almost every single trick that I have found, still no luck, however few hours of charging with my G3 charger bring the white LED back to life. Now if I press Power button for a few seconds, white LED flashes quickly 2 times and then it goes away and nothing on screen. If I just let it charge without touching anything, I can see white LED flashing sometimes. Gonna leave it charging overnight and see if that brings it back to life. Any tricks what else I can do with this phone or should I just toss it away?
Click to expand...
Click to collapse
Can you enter fastboot mode, if you can that might indicate a sign of life.

Can't enter fastboot either Tried to press Vol - and Power, white LED flashed only one time but still no luck :/ Maybe the mobo is bad?

What you have done to it

Just standard use, but one night it just died. It did not wake with overnight charging. It is now sitting on my desk without charger, gonna try it in the evening when i go home. If it does not wake, i think it really is dead

Try looking up the led codes from Motorola's site or something. That might help if there are any. Seems to me that you have some hardware damage. But I might be wrong.

Try keeping it on charger for a few hours, then with charger connected, press power and keep it pressed for like 2 straight minutes. That should at least wake the device. If it doesn't work, I'm afraid it is busted :/

calinorg said:
Try keeping it on charger for a few hours, then with charger connected, press power and keep it pressed for like 2 straight minutes. That should at least wake the device. If it doesn't work, I'm afraid it is busted :/
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Click to collapse
Tried that too, even pressed Power button over 2 minutes but all it does is white LED flashing randomly. Without charger it does absolutely nothing. I think the motherboard is busted

Seems like hardware damage to me too, use it for parts or sell it I guess.

why don't you take it to service center
it will be your best bet if engineer have a look whats the issue. just a get a approx cost. they will let you know. :good:

Unresponsive / Dead Phone - Any ideas?

So i recently picked up an XT1254 for a great deal. The phone is pristine, not a scratch on it. It looks brand new. It is totally unresponsive. If I plug it in the light on my charger turns from blue to green, telling me it's fast charging. But nothing from the phones LED. Also if I place it on a charging pad, color changes as well. I tried both options over night and still nothing. The phone does get warm (usual amount), leading me to believe it is charging the battery.
Holding the power button - nothing (no vibration, no moto logo, no LED responce)
Holding power + vol down - nothing ( = )
USB to PC - phone is not detected at all (I have ADB and current moto drivers installed)
I opened it up, and everything seems to be in order. No loose connections, no water damage. I checked the battery, and it reads roughly 2.5 volts across each pair of pins. Should it be reading 3.7-4 volts across each pair?
I unfortunately don't have another phone to check the MB, battery and LCD against.
I don't have a SIM installed in it, but I doubt it makes a difference?
Any ideas or advice would be greatly appreciated! Thanks-

alexacm said:
I checked the battery, and it reads roughly 2.5 volts across each pair of pins. Should it be reading 3.7-4 volts across each pair?
Click to expand...
Click to collapse
Quite low for li-ion/-poly, I don't think it ever sees 3v or under in normal circumstances. It might be well into "damaging the battery" territory at this point, and it should certainly be higher after charging it for a while...might be a goner.
Have you tried removing the battery completely and running it off the USB cord? I would expect it to, if nothing else, bring the screen up complaining of a bad/missing battery. That said, I've never tried unplugging mine to see what happens, so no real idea.
I would suggest trying to fabricate a factory cable (which would provide power directly, ignoring battery status), but I don't know if post-OMAP Motorolas are physically configured to use them. If they aren't, it'll do nothing at best and burn up traces at worst : \
Also, holding Vol - while plugging it in should bring the boot menu up, regardless of available battery charge (therefore serving as a quick test to see if the power button is the problem). But that might go out the window as well if the battery is deader than a doornail.
alexacm said:
I don't have a SIM installed in it, but I doubt it makes a difference?
Click to expand...
Click to collapse
It doesn't. When I fresh-install a ROM, I remove my SIM card to make sure none of my data gets used before I can turn various unwanted syncs/auto-updates off. The phone doesn't care at all, and nowadays Google isn't too whiny about a missing SIM either.

Hello guys.
Sorry for reviving an old thread, but I have similar problem with my Droid Turbo. During the replacement of the battery and speaker, I noticed oxidized resistors near the proximity sensor (which wasn't working since the purchase of the phone second-hand). I have cleaned the oxidized residue with ethanol and assembled the phone. After pressing the power button, the touch buttons light up and phone was vibrating every 20s but the screen was blank. So I disassembled it again to check all the connections but everything was fine. Since then, the phone won't even vibrate, just heats up a lot after holding power button. I have tried both batteries, speakers and also powering the phone without battery (only power cord connected). Both batteries are shoving around 3.8V.
Do you please have any suggestions how to fix the phone? Or should I assume that the motherboard died?
Thanks

(Help)Hard bricked U11

Never thought I would run into this moment that I need to ask for help on the forum, but I guess this is my last hope.
Here's the story:
I was on Oreo firmware and thinking of going back to Nougat because there are some apps only work on Nougat at this moment and I overall prefer Nougat design.
My phone was on S-off so I thought it would be perfectly fine for me to just flash Nougat firmware then flash the Nougat rom I desired like the good old days.
So then I launched Sunshine app, passed the compatibility test and the phone rebooted to download mode with S-off shown, everything was working fine so far.
And here was the problem happened, I typed in the command"fastboot flash zip firmwareXXX.zip".
Terminal showed error needs to reboot and flash again immediately as normal, the phone rebooted but never come back to download mode.
Now it only stays on black screen, if I tilt the phone a bit I can see the backlight glowing.
I've tried hard reset by holding power and volume down, it will reboot but still stays on black screen, neither system nor bootloader is accessible.
Even plugging to the computer detects nothing, not even QHSUSB_BULK mode.
However, the phone is able to charge though, I hook up the usb cable with a digital meter and it shows 5 volts and 0.5 amp.
I'm running out of solutions, I've searched through the entire forum and see no one has the similar experience.
This is the first time I hard brick a phone, been a loyal HTC user since good old Desire HD days.
If anyone has experience or solution for this, a kindly help is appreciated, thanks!

shasen1235 said:
Never thought I would run into this moment that I need to ask for help on the forum, but I guess this is my last hope.
Here's the story:
I was on Oreo firmware and thinking of going back to Nougat because there are some apps only work on Nougat at this moment and I overall prefer Nougat design.
My phone was on S-off so I thought it would be perfectly fine for me to just flash Nougat firmware then flash the Nougat rom I desired like the good old days.
So then I launched Sunshine app, passed the compatibility test and the phone rebooted to download mode with S-off shown, everything was working fine so far.
And here was the problem happened, I typed in the command"fastboot flash zip firmwareXXX.zip".
Terminal showed error needs to reboot and flash again immediately as normal, the phone rebooted but never come back to download mode.
Now it only stays on black screen, if I tilt the phone a bit I can see the backlight glowing.
I've tried hard reset by holding power and volume down, it will reboot but still stays on black screen, neither system nor bootloader is accessible.
Even plugging to the computer detects nothing, not even QHSUSB_BULK mode.
However, the phone is able to charge though, I hook up the usb cable with a digital meter and it shows 5 volts and 0.5 amp.
I'm running out of solutions, I've searched through the entire forum and see no one has the similar experience.
This is the first time I hard brick a phone, been a loyal HTC user since good old Desire HD days.
If anyone has experience or solution for this, a kindly help is appreciated, thanks!
Click to expand...
Click to collapse
Have you held the power and volume down button both together for exactly 1 minute,
I have a u11 that took for ever to reboot with corrupt os youll notice the capacative buttons start flash if its doing something or going to reset after about 30 seconds if not and nothin happens
Take the backing off and unplug the battery,
To do this heat the backing up with a hair dryer and get some really fine guitar picks, work your way arround slowly, in my case the U11 was not glass backed only plastic and was original backing ive heard they are glass now though so be careful,
Now with the backing off and exposed, take all of the 5 or 6 screws out from the plastic ariel cover with NFC chip attached (chip is gold bend it up off battery it is not glued down)
Then from the left of the device at the bottom of the plastic cover with ncf chip on it you should see a slight gap where the vibration motor is located and sits
Get a rounded pair of tweezer and insert just the tip into the opening and very carefully pry it up, it make take a while as some of the adhesive from the backing will be holding it down,
After that is off you have now exposed the devices PCB,
From the battery youll see the connector making its way to the PCB port disconnect it and reconnect it now try to boot directly to download mode with
Power
Volume down
Both at the same time, if this did not work the disconnect the battery again and wait 24hrs for the static electricity to disperse and try again, had this work on a completely frozen unresponisve evo 10 and u11 + and also my U11
Still no luck id say the emmc on the board has gone haywire either that or possibly one of the thermal transistors has blown in which youll see either black and burnt or white and powdery,
Im a phone tech you shouldnt have any problems doing all this just take your time,
Good luck mate

Matty1993 said:
Have you held the power and volume down button both together for exactly 1 minute,
I have a u11 that took for ever to reboot with corrupt os youll notice the capacative buttons start flash if its doing something or going to reset after about 30 seconds if not and nothin happens
Take the backing off and unplug the battery,
Click to expand...
Click to collapse
I've tried holding volume down and power buttons both for around 5 mins, no capacitive button blinking.
However I can tell the phone reboots several times during the procedure by seeing the backlight goes black and light up.
And about the reconnect battery route, I guess I'll just do it anyway, since the repairing price might be the same as buying a new one.
Thanks for the reply, mate!

shasen1235 said:
I've tried holding volume down and power buttons both for around 5 mins, no capacitive button blinking.
However I can tell the phone reboots several times during the procedure by seeing the backlight goes black and light up.
And about the reconnect battery route, I guess I'll just do it anyway, since the repairing price might be the same as buying a new one.
Thanks for the reply, mate!
Click to expand...
Click to collapse
Sounds like the logic board is trying to initialize but there isnt sufficient power to boot it,
its kinda like when you take the battery out of a phone then plug it on to charge without a battery and there is nothing but a lit up black screen and nothing else happens as theres not enough power to boot, this sounds the same to me as there are no red or green light after the orange when plugged in,
Get a hair dryer and heat the back of the phone up a few times and then plug it into charge to see if you cant boost the cells back to life, do this a few times,
If no change id most certainly suggest removing your back cover and unplugging and replugging the battery, once unplugged leave it for a few minutes, then plug back this will refresh the chips (especially emmc as this contains your entire system and bootloader, including download mode, RUU mode)
as soon as battery is reconnected plug it in on charge and try to boot it to download mode straight away also look for any change in the batteries light colour and any blinking,
the orange light when first plugged in is normal but should blink once or twice only then change to a solid red for discharged and charging or solid green green when near on 100% charged
If the above does not work disconnect the battery for 24 hours and try again, this will fully drain any static electricity in the device that may be lingering,
If still nothing after the 24 hours buy an OEM battery from ebay and install yourself, once you have the back cover off youll see the battery takes up 3/4 of the phones actual internal size,
Same as the back cover get your hair dryer place a shamwow or thick cloth over the PCB board then heat the battery up (NOT TO MUCH THOUGH only so its hot to the touch), then with the really thin guitar picks again (they should be bendable easily and flexible) work your way around the battery to cut through the adhesive securing it down,
CAUTION be very very careful the adhesive is strong keep the battery heated at all times to avoid pericing the battery and or damaaging the lcd as this is what its secured to, just take your time and work slowly do not force it out, once all the adhesive is cut it will remove easily by using the guitar pick insert between battery and housing and gently turn the pick from left to right and will pop out, (you will see the battery move when using pick from left to right if not you havent cut the adhesive properly work around the battery once again until you get movement from it)
Sorry for the long reply haha but dont send it to htc they are absolute rubbish hope this helps ive tried to be as detailed as i can its actually alot harder trying to explain it than it actually is to do it

Matty1993 said:
Sounds like the logic board is trying to initialize but there isnt sufficient power to boot it,
its kinda like when you take the battery out of a phone then plug it on to charge without a battery and there is nothing but a lit up black screen and nothing else happens as theres not enough power to boot, this sounds the same to me as there are no red or green light after the orange when plugged in,
Get a hair dryer and heat the back of the phone up a few times and then plug it into charge to see if you cant boost the cells back to life, do this a few times,
If no change id most certainly suggest removing your back cover and unplugging and replugging the battery, once unplugged leave it for a few minutes, then plug back this will refresh the chips (especially emmc as this contains your entire system and bootloader, including download mode, RUU mode)
as soon as battery is reconnected plug it in on charge and try to boot it to download mode straight away also look for any change in the batteries light colour and any blinking,
the orange light when first plugged in is normal but should blink once or twice only then change to a solid red for discharged and charging or solid green green when near on 100% charged
If the above does not work disconnect the battery for 24 hours and try again, this will fully drain any static electricity in the device that may be lingering,
If still nothing after the 24 hours buy an OEM battery from ebay and install yourself, once you have the back cover off youll see the battery takes up 3/4 of the phones actual internal size,
Same as the back cover get your hair dryer place a shamwow or thick cloth over the PCB board then heat the battery up (NOT TO MUCH THOUGH only so its hot to the touch), then with the really thin guitar picks again (they should be bendable easily and flexible) work your way around the battery to cut through the adhesive securing it down,
CAUTION be very very careful the adhesive is strong keep the battery heated at all times to avoid pericing the battery and or damaaging the lcd as this is what its secured to, just take your time and work slowly do not force it out, once all the adhesive is cut it will remove easily by using the guitar pick insert between battery and housing and gently turn the pick from left to right and will pop out, (you will see the battery move when using pick from left to right if not you havent cut the adhesive properly work around the battery once again until you get movement from it)
Sorry for the long reply haha but dont send it to htc they are absolute rubbish hope this helps ive tried to be as detailed as i can its actually alot harder trying to explain it than it actually is to do it
Click to expand...
Click to collapse
hello buddy thanks for this help, i have the same problem as the OP, i followed your instruction now i have an orange LED light up but no change, i dont know if i can access download mode or not cause my screen still black. tried htc_fastboot flash recovery but it done with FAILED not allowed on PRODUCTION device.
what should i do now, please help me, and sorry for my bad english. Thanks a lots