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[Q] Brand new Nexus One can't be powered on

I have a brand new Nexus One bought on last year April. For some reason it wasn't to be used. Yesterday, I got it out of the package and charged it for ready to be powered on. Unfortunately, it reacted nothing as I pressed the power button! I took out the battery and put it into other Nexus One, it showed the battery was 100% charged.
I took back the battery and repacked it to this new Nexus One. I tried to press the power button more and more with data cable connected pc. Nothing happened. Just one time, the sceen lighted on and the "X" in four colors appeared! I didn't know why it was powered on. Maybe I pressed the trackball or volume up/down buttons, God know it.
The X sceen lasted almost for ten minutes and then sceen was off! Yes. It shutdown! I can't power it on anymore!
It seemed the hardware was OK. It may be the locked by the outdate android system. The android prestored in this phone is version 2.1.
Any advice is welcome. Thanks.

Can u you go in fastboot? Press power button+trackball..if so then you can recover your phone by unlocking bootloader and falshing custom recovery.

Sadly, It can't be power on and go in fastboot by pressing trackball+power button.

Any more advice?

Check the battery terminals just to make sure they're not dirty.. Sadly, you MUST be able to at least be able to boot something (hboot/fastboot) in order to troubleshoot anything software related. Sounds like you've got a hardware issue that could be one of (literally) a million things.
Sell it on EBay for parts. You can probably get $50-$60

you could try pressing pwr/vol-/trackball all at same time, hold down for around 30 seconds to make sure
commonly known as 3 finger salute
try power on without sdcard by manual methods and plugging in and plugging in with no battery

I have seen a video on YouTube on how to fix the power button which is known for messing up and how to turn it on. Search YouTube
Sent from my Nexus One using XDA App

is it that the power button is not working? that would be weird for a new phone though.
have you tried to turn it on using the "jump start" method?
connect the cable. led the charging led come on. remove the battery, wait for the led to go off (while cable is still connected) then pop the battery back in.
see if you can get it to start that way

When you plug charger cable in your Nexus, does the orange or green LED go on?
If one of them does and stays (green for full battery, orange otherwise) - then your problem is most likely the power button. It may not be the only problem, but at least the one that's stopping you from turning on your phone. You can try "jumpstarting" it by inserting battery while charger is connected.
If you don't see LEDs when plugged in - your phone is done.
If you see blinking LEDs - battery terminals might need cleaning/fixing, it usually happens when the battery is out of the phone.

[Q] HTC One only charges when off

Wow, my phone stopped charging. I have TWRP 2.6.3.3, and tried ARHD 81.0, Maximus HD and Stock Rom to see if my battery would start charging again when on, yet it makes no difference.
When off, it does charge (official HTC wall charger, and others as well). For a couple of seconds you see the empty horizontal battery (no filling animation though) with a solid red led and after that it changes to the vertical battery icon which has a filling up animation and a less bright red led. After a couple more second it changes back to the horizontal battery icon, and this process loops indefinitely.
I have tried:
Charge for 20 minutes, then hold the power + vol up + vol down button for 2 minutes, multiple times - doesn't work
Charge for 20 minutes, then hold the power + vol up + vol down button for 2 minutes under a bright light, multiple times - doesn't work
Different chargers, including usb on my computer - doesn't work
Various reboots from bootloader and fastboot - doesn't work
The thing is - it IS charging when off, so the battery can't be broken, right? This must be a software problem. Should I try to flash another kernel or something?

I am facing the same problem. Even I tried changing ROMs. I changed from ARHD 81.0 to Maximum 41.0 and now on crdoid (cynogenmod) but it is not charging. It is exactly in the same state as yours.
I inquired with the HTC service center in my city. They said they need to change the motherboard of the phone which will cost me Rs. 19000 ($310). The amount might vary in your country. I hope there is another solution to this problem except changing the motherboard.

BUMP

rahulwadhwani said:
BUMP
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Hi Rahulwadhwani,
I have tried everything, finally decided to go back to stock, because you have a 24 months guarantee period on your device. Tonight I'm gonna bring it back in the shop where I bought it.
If you start reading from here, you can see how I brough it back to stock, I can imagine you face the same things as me when you decide to bring it back to stock too.
http://forum.xda-developers.com/showpost.php?p=55521074&postcount=624 (replies are slow the first couple of pages)

I went to the htc service center again. They charged me Rs. 1350 (approx $22) and chanted the charging port of the phone. It's working properly now.
By the way, my phone had a custom rom and was out of warranty too..
Sent from my GT-I9300 using XDA Free mobile app

That's good news, glad you had it sorted out!

I have tried everything as well. And since it DOES charging when off I tend to think it's not port/charger problem.
I chatted with HTC customer support and they told me that developer working on software fix for that which will be distributed over the air (OTA updates). I'm not confident how true is that, but I decide to switch to Maximus HD room from Revolution HD, since the former has OTA updates support.
Things I've tried so far:
Plug-in charger -> power off -> press and hold Power button + volume down for 15+ seconds and put proximity sensor under the bright light
Plug-in charger -> power off -> let it charge for 10+ minutes -> press and hold Power button + volume up + volume down buttons for 2+ minutes -> release them
Reboot the phone into the Safe mode (while charger is plugged in)
Different chargers, car charger, connect to PC
And just for the record - it won't charge even if it's off if Fast Boot is ON.

sfba said:
I have tried everything as well. And since it DOES charging when off I tend to think it's not port/charger problem.
I chatted with HTC customer support and they told me that developer working on software fix for that which will be distributed over the air (OTA updates). I'm not confident how true is that, but I decide to switch to Maximus HD room from Revolution HD, since the former has OTA updates support.
Things I've tried so far:
Plug-in charger -> power off -> press and hold Power button + volume down for 15+ seconds and put proximity sensor under the bright light
Plug-in charger -> power off -> let it charge for 10+ minutes -> press and hold Power button + volume up + volume down buttons for 2+ minutes -> release them
Reboot the phone into the Safe mode (while charger is plugged in)
Different chargers, car charger, connect to PC
And just for the record - it won't charge even if it's off if Fast Boot is ON.
Click to expand...
Click to collapse
Let's hope they will come with a software fix. I wonder what that is gonna be though, I have tried so many different roms and firmwares, they made no difference. Other people with the same problem had it fixed by replacing the usb port or even the motherboard.

Blinking red light - phone doesn't turn on

So I think I did something which I've not done before - brick my phone completely.
I got two Z3C so this is my 'spare' one which I was testing CarbonROM on. Because I want to ease my transition to a new ROM I wanted to backup my entire "main phone" and restore it on my secondary phone, with TWRP. When I tried this, it seemed like it only wanted to restore system, data (excl storage) and something else I can't remember. But it didnt include the FOTAKernel and stuff I had taken a backup of from the other phone.
Anyway, the restore failed when it came to data (excl). I gave the phone a reboot and since then it's just been flashing a red light. I can't hold down power button and vol down to simulate the battery pull. If I plug in USB while holding volup or down it doesnt enter flashmode or fastboot - it just blinks red.
The phone was plenty charged when I worked with it, 50%+ was the last battery level TWRP told me.
Other googlings bring me to people who write its a hardware fault - dead motherboard or so. Others have experienced it with waterdamage and stuff like that but my scenario is nothing like this.
Any clues ?

Kocane said:
So I think I did something which I've not done before - brick my phone completely.
I got two Z3C so this is my 'spare' one which I was testing CarbonROM on. Because I want to ease my transition to a new ROM I wanted to backup my entire "main phone" and restore it on my secondary phone, with TWRP. When I tried this, it seemed like it only wanted to restore system, data (excl storage) and something else I can't remember. But it didnt include the FOTAKernel and stuff I had taken a backup of from the other phone.
Anyway, the restore failed when it came to data (excl). I gave the phone a reboot and since then it's just been flashing a red light. I can't hold down power button and vol down to simulate the battery pull. If I plug in USB while holding volup or down it doesnt enter flashmode or fastboot - it just blinks red.
The phone was plenty charged when I worked with it, 50%+ was the last battery level TWRP told me.
Other googlings bring me to people who write its a hardware fault - dead motherboard or so. Others have experienced it with waterdamage and stuff like that but my scenario is nothing like this.
Any clues ?
Click to expand...
Click to collapse
I don't think you can restore from a different phone. That's probably the cause. However, I also have not heard of a hard-brick happening just by trying to flash the wrong thing in TWRP, (but maybe possible).
I have had the red light issue a few times, after flashing bad zip, but not on Z3c, on my XA, and I was able to resurrect it by holding down volume and power buttons while plugging it in, but for some reason, it only worked when I used a different charger/cable. All of a sudden it pops back to life with zero battery, (it was full when it died). Maybe you can try that.
I've also found that with some custom rooms / kernels, you need to hold volume and power buttons for about 10 seconds to get it to respond...

levone1 said:
I don't think you can restore from a different phone. That's probably the cause. However, I also have not heard of a hard-brick happening just by trying to flash the wrong thing in TWRP, (but maybe possible).
I have had the red light issue a few times, after flashing bad zip, but not on Z3c, on my XA, and I was able to resurrect it by holding down volume and power buttons while plugging it in, but for some reason, it only worked when I used a different charger/cable. All of a sudden it pops back to life with zero battery, (it was full when it died). Maybe you can try that.
I've also found that with some custom rooms / kernels, you need to hold volume and power buttons for about 10 seconds to get it to respond...
Click to expand...
Click to collapse
Hm. I've had it charging from USB connected to my laptop overnight - nothing different. Plugged it into a real charger when I went to work, will see when I get home.
It doesn't react to the powerbutton + voldown combo, which I've used extensively in the past. I haven't tried plugging it while holding any button. Did you plug it into a charger or computer USB port?

Kocane said:
Hm. I've had it charging from USB connected to my laptop overnight - nothing different. Plugged it into a real charger when I went to work, will see when I get home.
It doesn't react to the powerbutton + voldown combo, which I've used extensively in the past. I haven't tried plugging it while holding any button. Did you plug it into a charger or computer USB port?
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Click to collapse
I did the same thing for a whole day, (tried to leave it plugged in to charge), and no response, but when I changed the cable and power source, and held down the buttons while plugging it in, after a few tries with different buttons, it suddenly popped on, with zero battery, and started charging.
Also, you might try posting in a TWRP thread. See if anyone has seen this before...

Stuck on "please lock bootloader" screen when plugging in after depleting the battery

Stuck on "please lock bootloader" screen when plugging in after depleting the battery
No button inputs work. The only solution seems to be waiting until the battery fully runs out and plugging it in again, after which it sometimes boots up. At least I got it to the first time, it failed just now. Maybe I need to hold some button combination while doing so?
How do I fix this properly? And what's a sure way to get it to boot from this? I'm already wasting half and hour on a minute's charge, God forbid I ever forget about it plugged in for longer. Would have to throw it in the drawer for a couple days and probably end up with some permanent burn-in too.

I haven't seen the screen in ages but doesn't it tell you to press the power button to acknowledge the unlocked bootloader? Also from memory it tells you it will automatically continue but it never does.

What seems to have done the trick is holding power&volume+ (probably just power is enough), so it loops through the 'empty battery' splash screen at least once. I think that's how I did it the first time too.

drwharris said:
I haven't seen the screen in ages but doesn't it tell you to press the power button to acknowledge the unlocked bootloader? Also from memory it tells you it will automatically continue but it never does.
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It never seemed to make any difference whether I pressed the power button or not, in fact it always booted up automatically after some time, this scenario excluded.

I suppose my problem might lie in the fact that buttons aren't working on that screen for whatever reason? Rather than it not going away automatically after battery depletion.

It is a bug in the bootloader. You can get out of the screen by disconnecting (!) the cable, and then holding all three buttons for multiple minutes until the device forcefully shuts down.
Before you do that, leave the phone plugged in for 10 minutes or so, so it can charge the battery to some extend. Then start the phone without (!) the cable plugged in, and wait until it boots into Android. When it is booted, you can safely plug in the cable and let it charge to 100%.
Just make sure you leave it for some minutes so it has enough charge to boot through the bootloader and start Android.

VonZigmas said:
I suppose my problem might lie in the fact that buttons aren't working on that screen for whatever reason? Rather than it not going away automatically after battery depletion.
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Click to collapse
i had a similar problem after a failed attempt to boot into recovery.
for me the following did do the trick and booted my phone back into system:
- deplete battery completely
- plug in charger and keep power button pressed until phone is charged enough to attempt boot
- keep the power button pressed until nokia logo appears

THMSP said:
It is a bug in the bootloader. You can get out of the screen by disconnecting (!) the cable, and then holding all three buttons for multiple minutes until the device forcefully shuts down.
Before you do that, leave the phone plugged in for 10 minutes or so, so it can charge the battery to some extend. Then start the phone without (!) the cable plugged in, and wait until it boots into Android. When it is booted, you can safely plug in the cable and let it charge to 100%.
Just make sure you leave it for some minutes so it has enough charge to boot through the bootloader and start Android.
Click to expand...
Click to collapse
How long is "multiple minutes"? I tried holding all three buttons at first, but gave up after probably a minute of nothing happening. I'll keep that in mind though.
Is there any hope for this to be fixed in the future?

VonZigmas said:
How long is "multiple minutes"? I tried holding all three buttons at first, but gave up after probably a minute of nothing happening. I'll keep that in mind though.
Is there any hope for this to be fixed in the future?
Click to expand...
Click to collapse
Well, multiple definitly isn't one I haven't stopped the time yet, but expect waiting and pressing them for around 2 to 3 minutes, maybe even 5. It might sound stupid, but it will work.
About fixing it, I don't know. It might be a bug in the reference bootloader that Qualcomm provides for Snapdragon 835 chipsets, and I doubt that FIH / HMD have the resources to debug and fix that.

I get this same screen while the phone's powered off + charging and it's annoying.
I was going to start a thread to ask whether it's possible to charge this phone while it's turned off (without the screen being kept on) after unlocking the bootloader. I guess based on the posts in this thread, that's not possible? [emoji2357]

OneDream said:
I get this same screen while the phone's powered off + charging and it's annoying.
I was going to start a thread to ask whether it's possible to charge this phone while it's turned off (without the screen being kept on) after unlocking the bootloader. I guess based on the posts in this thread, that's not possible? [emoji2357]
Click to expand...
Click to collapse
No, I guess it isn't. I've tried to plug it in while it's off and turn off as it's charging and in either case it resulted in the phone hanging up on that screen. I can confirm though that holding all three buttons for a while does turn it off and allow me to boot normally which is cool.
But is that possible with a locked bootloader anyway? Or does it always power on? I can't tell if I ever needed it to charge like that.

I see this "warning" message only on android pie builds, it doesn't seem on oreo builds. I think problem seems that kernel dependent (oreo is on 4.4.78 and pie is on 4.4.153). There is one way to get rid of that message, as @THMSP said, holding all 3 buttons pressed during 2-3 minutes and let it to be shuted down. Then, let the device to boot normally and plug in. Finally you shouldn't connect to charger when it's turned off on any pie build.

SM-T800 boot-loops and dies the moment you let go of the power button?

I've got an SM-T800 behaving very oddly, hope someone knows what's up!
If you attempt to boot it, it will flash up the Samsung logo, then die, and repeat in an endless boot-loop.
If you hold the power button down, oddly, it changes; instead it will proceed to the animated SAMSUNG logo which will then continue to pulse in and out indefinitely until you get bored and release the power button... at which point it instantly dies and then begins boot-looping again.
If you try to enter recovery by holding power + volume up + home, it will do so, but the moment you let go of the power button it dies.
Thinking it was down to the battery, I tried replacing it, and if anything the behaviour has been worse since!! It was at least possible previously to get the thing to sit in recovery without rebooting, but now it never does if you let go of the power button.
I've also tried reflashing the default firmware via ODIN; the one thing that always works is the download mode (power + volume down + home); I can reliably boot it into download mode and flash via ODIN, but then on reboot, it gets partway through the installation process (like a few seconds in) and then boot loops back to the samsung logo again.
Now it's difficult to get it to even charge; it will keep looping the charging symbol (battery with a lighting bolt on it) on and off the screen unless you fettle the buttons until it just sits at a black screen. I can see from the USB charger it is still drawing charge current.
Any ideas??!

It probably dead. Speaking as someone who had this issue for countless devices, I say that your battery probably can't hold enough charge anymore to completely power the device through.
It doesn't matter even if you charge it to 100%. The battery had degraded to a point where a minimal charge required to let the device pass the crazy power surge required during Android boot is just not meeting the minimum.
Hence it fizzles out. And rebooted.
I kept replacing my Galaxy S5 battery until few months ago, no battery I bought is enough to fully power it on anymore.

Thanks for the response; alas, I already tried replacing the battery; if anything it was worse! I suppose it is possible that the replacement battery was also a dud, though? Unfortunately it may be difficult to do a load test (a lot of batteries might not even provide power without specific conditions being met), perhaps I can probe the pins while it tries to boot and see if the voltage sags or something.

I have the same problem and I found this in Yoube; search for "Samsung galaxy tab s restarting issue" video from "Electronics repair school"
It shows bad contact on battery connector soldered side...

I have the same issue, I can hold down the power button and it will boot up completely. As soon as I let go, it reboots over and over again. So far I've replaced the:
USB Charger Port Connector Module Flex Cable
LCD Connector Flex Ribbon Cable
and the Battery
No change in boot up - The only option left , I think, would be to replace the main board. Any thoughts?

i got that issue too,
i did kind of a battery recalibration
meaning: i fully discharged my sm-t800 (took me some time doing reboots until the tab was totally dead)
then charged it to 100% without booting it
unplug it and reboot.
and well, now it works again
the clue here is:
the system stored wrong battery data over the time, so it randomly thinks the battery is at 0% and does an auto-shutdown. To repair this, you have to reset the system with recalibrating the battery, so the system deletes all old data and starts logging new data.
in my case this procedure worked out great
hope you guys will have the same success as i did

Hello everybody!
I thought I would let you know how I solved this issue WITHOUT having to do a full factory reset...
Or so I thought.
Turns out that it started shutting down and bootlooping after a while again.
Even after I ordered a replacement battery and charged that up. At first it looked like it would work and then it started shutting down randomly and bootlooping.
Probably will have to throw the thing out since it doesn't want to work. Makes no sense how its so uncooperative even after putting in a new good battery in the tablet but there's not nuch more that can be done.
If I just start it *sometimes* it will boot up and get to the android OS. Then work for a while before shutting down.
Sometimes it just bootloops at the Samsung Galaxy S logo over and over.
Holding the power button it does boot but if you release the button it MOST often just shuts off and bootloops.
Anyone know if there's anything to be done to fix this?
//Kindest regards XDAFan2015

xdafan2015 said:
Hello everybody!
I thought I would let you know how I solved this issue WITHOUT having to do a full factory reset...
Or so I thought.
Turns out that it started shutting down and bootlooping after a while again.
Even after I ordered a replacement battery and charged that up. At first it looked like it would work and then it started shutting down randomly and bootlooping.
Probably will have to throw the thing out since it doesn't want to work. Makes no sense how its so uncooperative even after putting in a new good battery in the tablet but there's not nuch more that can be done.
If I just start it *sometimes* it will boot up and get to the android OS. Then work for a while before shutting down.
Sometimes it just bootloops at the Samsung Galaxy S logo over and over.
Holding the power button it does boot but if you release the button it MOST often just shuts off and bootloops.
Anyone know if there's anything to be done to fix this?
//Kindest regards XDAFan2015
Click to expand...
Click to collapse
I have had the same experience with my T800. What I have been doing is to tape the power button down using scotch tape. The tablet can be waken up by pressing the home button. In my case, I need to remove the button to recharge the tablet.. So far so good.