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Phone won't boot

Hey guys,
My phone shut off unexpectedly today and now won't turn back on. When I try to power it on I see the Google logo for a couple seconds and then it'll just shut off again. I tried holding the volume up/down buttons to access the bootloader, but right after I get to the screen it just restarts itself again.
Connecting to power (AC or USB) causes it to constantly reboot over and over, it just shows the Google logo for a couple seconds and then restarts again.
Any ideas on what I can do?

rosscarrothers said:
Hey guys,
My phone shut off unexpectedly today and now won't turn back on. When I try to power it on I see the Google logo for a couple seconds and then it'll just shut off again. I tried holding the volume up/down buttons to access the bootloader, but right after I get to the screen it just restarts itself again.
Connecting to power (AC or USB) causes it to constantly reboot over and over, it just shows the Google logo for a couple seconds and then restarts again.
Any ideas on what I can do?
Click to expand...
Click to collapse
Provide more information for a starter - stock? unlocked bootloader? rooted? third party recovery? rom and if yes which?
If it's stock I'd RMA it.
If not what did you do immediately before the problem started?
try holding the power button for > 2 seconds which should turn it off completely, leave it on a wall charger for at least a couple of hours then turn it back on - I doubt it'll fix the problem but it's a simple thing to try...

Clancy_s said:
Provide more information for a starter - stock? unlocked bootloader? rooted? third party recovery? rom and if yes which?
If it's stock I'd RMA it.
If not what did you do immediately before the problem started?
try holding the power button for > 2 seconds which should turn it off completely, leave it on a wall charger for at least a couple of hours then turn it back on - I doubt it'll fix the problem but it's a simple thing to try...
Click to expand...
Click to collapse
Everything on it is stock, no ROM, not rooted. I had just taken it out of my pocket to check the time, put it back in my pocket and then felt it vibrate, took it back out to see it at the Google logo and haven't been able to get it started since. There was one or two times when it got past the Google logo and started to show the start up animation (the four colours bouncing around or whatever it is) but then it shut off again.
I tried holding the power button to completely turn it off, but plugging it into the wall charger just causes it to repeatedly attempt to boot like I mentioned earlier. I'll leave it for a while and hope for the best

Sounds like the mobo is bad. Most likely will have to rma it.

rosscarrothers said:
Hey guys,
My phone shut off unexpectedly today and now won't turn back on. When I try to power it on I see the Google logo for a couple seconds and then it'll just shut off again. I tried holding the volume up/down buttons to access the bootloader, but right after I get to the screen it just restarts itself again.
Connecting to power (AC or USB) causes it to constantly reboot over and over, it just shows the Google logo for a couple seconds and then restarts again.
Any ideas on what I can do?
Click to expand...
Click to collapse
Do you have a case on? The case could be faulty.
Sent from my Nexus 5 using Tapatalk

jd1639 said:
Sounds like the mobo is bad. Most likely will have to rma it.
Click to expand...
Click to collapse
Maybe not. Sounds like a stuck power button to me.
OP does the phone just endlessly repeat this cycle? If so it's rebooting itself do to a stuck power button. One other users already reported similar issues and his power button was indeed stuck. Mash the power button hard for a minute to see if you can unstick it.

theesotericone said:
Maybe not. Sounds like a stuck power button to me.
OP does the phone just endlessly repeat this cycle? If so it's rebooting itself do to a stuck power button. One other users already reported similar issues and his power button was indeed stuck. Mash the power button hard for a minute to see if you can unstick it.
Click to expand...
Click to collapse
You got it!
Thanks so much, really wasn't looking forward to waiting for weeks while the RMA went through. The button didn't appear to be stuck - it was still clicky - but after mashing it for a minute it started up normally and appears to be fine now.

Did you flash any ROMs or anything previously?
Sent from my Nexus 5 using xda app-developers app

scottdouglasdick said:
Did you flash any ROMs or anything previously?
Sent from my Nexus 5 using xda app-developers app
Click to expand...
Click to collapse
brother the issue is gone, as mentioned "sticky power button" was causing it. read the thread before posting. btw thanks for effort anyway... haha
:laugh::silly:

Hi all. Sorry to reopen an old thread (but xda suggested I check here before making my own thread).
I think we have the exact same problem with a Nexus 5. Unfortunately, bashing the power button doesn't seem to be helping (and makes me feel slightly silly .
Anyone know how much effort it would be to take it apart to get to the part that's stuck? Any good instructions?
Thanks.

Weird, I have the same issue starting a few hours ago. I updated to the Oct 17 beta of Cataclysm then a hour later it happened. But was told it sounds like the power button issue.
Took it apart, tried to fix it. If plugged in I can get into the bootloader, but then it reboots again. I've tried tapping it on a hard surface, and it gets seems like it almost fixes it because it'll connect to my laptop but then reboots again.
Could it be the battery? It was fully charged but then died as I was deleting hundreds of photo's in Dropbox to move photo's over from my phone because it was full.

I too am running into this same issue. My screen cracked so I replaced the digitizer with some success. In the process I damaged the battery and needed to replace it. When I got the new battery and replaced it my phone is now unusable.
When unplugged: I turn on the phone and it's running the ANDROID animation then turns off.
When plugged in: I turn on the phone, the ANDROID animation runs then the phone restarts and continues the process over and over again.
I then flashed the phone with Marshmallow and the same thing happens. Except now that I flashed it I get the Android icon with the spinning gear. So; I flashed it back to 5.1.1, but the same result.
Could I have physically damaged something inside or is it a battery issue? Thanks for any insight.

Nexus 5 wont boot

Last night, my nexus 5 suddenly rebooted itself. When it restarted it was in a boot loop. but not a boot loop that i can get out of.
It just keeps going round and round almost as if the power button is stuck. however the power button is not stuck.
i cant get into recovery to clear the cache as when i boot into the bootloader it just automatically restarts again, i can move one option up or down and that is to shut down or reboot into bootloader, but not the second move that would take me to recovery.
i have now taken the back off, and unplugged the battery in the vain hope that it clears through whatever is causing the issue but im not convinced it will make any difference.
Please advise. i'm completely housebound and cannot walk due to having a knee operation, and completely dependent on my mobile if i have an emergency.
i've tried Kwoggers out of the box fix from his 2.1.2 toolkit but this didnt work as the phone wont stay in one place long enough for it to get a fix.

spasypaddy said:
Last night, my nexus 5 suddenly rebooted itself. When it restarted it was in a boot loop. but not a boot loop that i can get out of.
It just keeps going round and round almost as if the power button is stuck. however the power button is not stuck.
i cant get into recovery to clear the cache as when i boot into the bootloader it just automatically restarts again, i can move one option up or down and that is to shut down or reboot into bootloader, but not the second move that would take me to recovery.
i have now taken the back off, and unplugged the battery in the vain hope that it clears through whatever is causing the issue but im not convinced it will make any difference.
Please advise. i'm completely housebound and cannot walk due to having a knee operation, and completely dependent on my mobile if i have an emergency.
i've tried Kwoggers out of the box fix from his 2.1.2 toolkit but this didnt work as the phone wont stay in one place long enough for it to get a fix.
Click to expand...
Click to collapse
If it reboots, even in bootloader, then it's either a broken power button or a broken motherboard.

Lethargy said:
If it reboots, even in bootloader, then it's either a broken power button or a broken motherboard.
Click to expand...
Click to collapse
thanks for replying, but why would this happen all of a sudden?
the phone was on, it hadn't been rebooted for a few days. It hadn't been dropped. but suddenly it went into a boot loop.

spasypaddy said:
thanks for replying, but why would this happen all of a sudden?
the phone was on, it hadn't been rebooted for a few days. It hadn't been dropped. but suddenly it went into a boot loop.
Click to expand...
Click to collapse
Not exactly sure, it's happened to a couple of people. Another reason could be a defective battery. What happens if you plug in the charger and attempt to boot?

Lethargy said:
Not exactly sure, it's happened to a couple of people. Another reason could be a defective battery. What happens if you plug in the charger and attempt to boot?
Click to expand...
Click to collapse
same. just boot loops.
the reason i dont think its the power button is it just stops doing it and just switches off.
when its plugged in it just reboots around the white google logo, constantly. without being plugged in it goes to the 4 balls and reoots

spasypaddy said:
same. just boot loops.
sometimes it gets to the 4 balls converging, sometimes it just reboots around the google logo.
Click to expand...
Click to collapse
Afraid there's not much you can do other than RMA, then.

Lethargy said:
Afraid there's not much you can do other than RMA, then.
Click to expand...
Click to collapse
thanks, i just rang google and they are sending me some troubleshooting via email and then it will get replaced.
will google mind that ive opened the back up?

spasypaddy said:
thanks, i just rang google and they are sending me some troubleshooting via email and then it will get replaced.
will google mind that ive opened the back up?
Click to expand...
Click to collapse
I'm not sure, I think it voids the warranty :/

hmm
i'll just have to risk it if their troubleshooting doesnt work

HTC One(M7) Boot Problem!

Hi i am new here and was hoping that i get a solution to the problem that i have been trying to figure out for a few days now. I searched a lot before posting but wasnt able to find something related to this. My phone is an HTC One M7 and i was trying to update to the latest OS when the phone stopped booting into it after the update as it got stuck at the boot screen. So i waited for an hour until i decided to shut it off and when i tried restarting it, the phone stayed stuck at the HTC logo not even the ONE logo screen.
So i read a few suggestions and went into the bootloader > recovery and cleared cache and then restarted the phone as per the instruction i got afterwards. This time it kept cycling around the boot screen and black screen and so on. So i again went into bootloader and decided to *power down* the device till i was able to learn what to do next but to my surprise, the phone doesnt boot anymore into whatever there is - tried Power + Vol down, Power hold etc.
The phone charges though and is currently at 100%. So i am right now in a dilemma as whether to continue trying to fix this by myself or just send it to the service centre where they will charge around 300$ for this to get repaired while telling me that something got fried on the inside.
Thanks in advance!

Damn phone stuck in bootloop!

Came home from work yesterday and the Pure XL was dead, said it needed to be charged. Never happened before but I figured whatever and plugged it in and went to sleep. Woke up this morning and powered on the phone and the all white BLU splash screen came up and then the phone went off. Came on again and the all white BLU splash screen came up and went off. Ive tried holding down the power button for over a minute. Tried holding the power button and volume keys to boot into recovery from 10 seconds to 2 minutes, nothing stops it! It just keeps rebooting. This has been my apprehension towards purchasing phones with non removable batteries. The boot recycle happens about every 15 seconds and the phone vibrates everytime it boots up for the past 2 hours. Its getting very annoying and there is no way to make it stop. Any help would be greatly appreciated.

thomasanderson said:
Came home from work yesterday and the Pure XL was dead, said it needed to be charged. Never happened before but I figured whatever and plugged it in and went to sleep. Woke up this morning and powered on the phone and the all white BLU splash screen came up and then the phone went off. Came on again and the all white BLU splash screen came up and went off. Ive tried holding down the power button for over a minute. Tried holding the power button and volume keys to boot into recovery from 10 seconds to 2 minutes, nothing stops it! It just keeps rebooting. This has been my apprehension towards purchasing phones with non removable batteries. The boot recycle happens about every 15 seconds and the phone vibrates everytime it boots up for the past 2 hours. Its getting very annoying and there is no way to make it stop. Any help would be greatly appreciated.
Click to expand...
Click to collapse
Plug it into your computer (you'll notice that there will be a longer black screen in-between the bootloops) and hold down the power button for at least 10 seconds or more, then release it after the next vibration and the white BLU screen shows up. It might take a couple of tries.
If you manage to boot into at least recovery but can't boot into the system, then try clearing your cache/dalvik cache and try rebooting into system again.
If all of the above doesn't work for you, then your boot.img/system has gone bad, and you'll have to flash the stock images with SP Flash Tool (both of which can be found on other posts on this forum).

follow the instructions on the SP flash tool thread... sounds like what happened to me after bad flash... theres a lot of information in that thread that will set you up...

Thanks for the quick replies guys. The PC trick didnt work at all. I just called BLU and asked for a replacement(havent heard back from them ironically). I put the phone in the basement so I wouldnt have to deal with that incessant buzzing every 15 seconds. Eventually the battery died. Since I had it powered off finally, I plugged it in for about 10 minutes to give it enough of a charge to power on but not stay on to buzz for another 2 hours. This time I powered it on using the master reset button combo and was finally able to wipe the cache and restart the phone. Took a good 4 or 5 minutes to boot after that, but everything has been fine since. Really dont know what initially caused the issue, never happened before. Good thing too, cause BLU told me that they would send me a RMA within the hour and I still havent heard from them. Think this will be my last BLU phone. Thanks for the assist.

My phone Is stocked without root or Twrp. And I find my self having a bootloop once a month for an odd reason. This forces me to take bat out and put it back in or just let it loop til battery dies
Sent from my PURE XL using XDA-Developers mobile app

bolanoboyboom said:
My phone Is stocked without root or Twrp. And I find my self having a bootloop once a month for an odd reason. This forces me to take bat out and put it back in or just let it loop til battery dies
Sent from my PURE XL using XDA-Developers mobile app
Click to expand...
Click to collapse
??????

My phone is basically out of the box and I'm getting boot loop problems when I first boot. This happens like once a month
Sent from my PURE XL using XDA-Developers mobile app

This happened to me for first time yesterday. Bought the phone earlier this year and everything worked fine. I restarted the phone because my sound recorder app froze up twice on open and the infinite boot started until the battery died. Tried the {power}{vol up} thing, didn't work to stop it, so I put it in my car and went back to the conference I was attending. Battery was dead when I got out. Contacted BLU by phone and they started a ticket for me, but I figured I'd see if other people were having this issue and learn what they did because I'd rather not be out of a phone for however long it takes for BLU to replace mine. Stumbled on this page. I never rooted my phone. And BLU only sent one wireless update since I've had the phone. I'm trying to get into the menu by connecting to the computer. Worked the first time, I cleared cache, and tried to backup my files, but I'd taken out the SD card in expectation of sending it to BLU. So, Powered off the phone, put the card back in, and now I haven't been able to get the menu back. Still working on it, if there are any suggestions anyone drops on me before Tuesday when I'll likely ship it (or at least hope to because I'll be yelling at them Monday), I'd appreciate it.

Update
num1greeter said:
This happened to me for first time yesterday. Bought the phone earlier this year and everything worked fine. I restarted the phone because my sound recorder app froze up twice on open and the infinite boot started until the battery died. Tried the {power}{vol up} thing, didn't work to stop it, so I put it in my car and went back to the conference I was attending. Battery was dead when I got out. Contacted BLU by phone and they started a ticket for me, but I figured I'd see if other people were having this issue and learn what they did because I'd rather not be out of a phone for however long it takes for BLU to replace mine. Stumbled on this page. I never rooted my phone. And BLU only sent one wireless update since I've had the phone. I'm trying to get into the menu by connecting to the computer. Worked the first time, I cleared cache, and tried to backup my files, but I'd taken out the SD card in expectation of sending it to BLU. So, Powered off the phone, put the card back in, and now I haven't been able to get the menu back. Still working on it, if there are any suggestions anyone drops on me before Tuesday when I'll likely ship it (or at least hope to because I'll be yelling at them Monday), I'd appreciate it.
Click to expand...
Click to collapse
I tried to flash the phone, but the bootloop apparently wouldn't allow that. I had 0.0% progress after 3 hours. I then tried to go back into the menu you get from {Power}{Vol UP}: still no go. So, I started to take the phone apart again to get ready for shipping. The battery was still low so it didn't take long for it to die after I unplugged it from the computer. Out of curiosity, I tried to repeat finding the menu like I did earlier that day (conditions were that the phone had no charge when I connected it to the computer, and my SD card was removed.) No go. But, then I hit {Power}{Vol Up}{Vol Down} just to see what happened, and boom. My phone loaded up. No loop... Figured somehow the files had copied and the status bar was wrong. Turned the phone off, put my SD card back in and turned the phone on. Loop reappears ...I waited for the phone to die again, took out the SD, attempted to turn it on and the loop was there. Connected it to the computer and hit all 3 buttons, and the phone loads up. So, now I'm confused. Is there any way that the problem is some crappy connection to the SD?

Galaxy S7 won't turn on but will charge(kinda)

I've had this phone for about 2 months now, and from the beginning, it's had an issue where it would randomly freeze, restart, and get stuck in a boot loop for random amounts of time. Sometimes it would be fine after 2 minutes, sometimes it would need 10. I kept thinking this was a firmware issue - the phone WAS rooted with TWRP installed, but none of my past phones have had this issue and hardly anybody online seems to have had it, either - and just thought that maybe installing a custom ROM would fix it, but never got around to doing so.
3 days ago, my S7 went into a boot loop again, so I just decided to put it down and let it do its thing. After 20 minutes, however, it still wasn't booting, so I booted into TWRP, and cleared the cache and Dalvik cache. Another 20 minutes later, I went into panic mode and started doing Nandroid backups of my stuff. I decided that I had no other choice but to commence with finding a ROM to replace stock. In the meantime, I just plugged it in and let it keep looping, hoping against hope that it would just fix itself like it always did.
About half an hour later, I was ready to install the ROM I'd decided on. I went and picked up my phone, but all that I saw was the screen was black, and the blue notification LED was lit up. I tried holding Vol- + Power to start booting it into TWRP, but nothing happened. The phone didn't vibrate, the screen didn't change, and the LED stayed lit. I tried holding every button combination possible, for even as long as a minute, but the phone refused to respond. I tried plugging it into my computer, but Windows didn't detect anything.
Skip to today, and the phone's battery has long since died(the LED isn't lit up, so I can only assume...), and I just decided to plug the phone in for the hell of it just to see if maybe it would maybe work again. To my astonishment, 2 minutes later, the battery icon came up on the screen, but the charging animation wasn't there. When I held Vol- + Power, the phone actually responded and restarted! Though, it wouldn't boot past the Galaxy S7 splash screen, and when I tried to boot it into TWRP, it went back to being a brick. I let it sit for about 10 minutes, plugged it in, and this time tried to get it into Download Mode, and it worked!
I downloaded the Switzerland version of the G930F firmware, flashed it in Odin, and everything seems to have worked. Odin says it succeeded, but when the phone tried to restart, it got to the splash screen, and after a few minutes, the screen went black again. When I plug it in now, the Galaxy S7 screen will come up, but now I can't seem to get into Download Mode anymore(though, it DOES still seem to respond to me pressing Vol- + Power).
Does anyone have any idea what's going on? I can only seem to find 3 or 4 other threads on various forums about this problem, but none of them have any answers. People just keep saying the usual "Hold Vol- and Power to make the phone restart", but in case I haven't made it clear, THAT ISN'T WORKING.
And before you suggest that I return it to where I bought it for a replacement or refund: I bought this phone on eBay from a seller who said it was in pretty much mint condition. When the phone arrived, there was not a dent or scratch anywhere on the phone, even around the charger port, so I have no reason to believe he was lying. When I asked him about any possible problems with the phone's operational stability the other day, he says he tested it for about 2 weeks, and that he didn't notice anything.

Sounds like a hardware fault, not much else you can do other than flashing stock and factory resetting, which you've done
Considering it had a fault from day 1 it sounds like that fault finally caught up with it
Likely scenario if sent for repair, new motherboard replacement needed