Droid Maxx Black Screen Of Death - Droid Ultra Q&A, Help & Troubleshooting

Background, I have a Droid Maxx that I purchased/leased from Verizon, that arrived with 6-7.2. I downgraded to 6-7 and rooted. From the time of purchase the phone would reboot a few times a week. After rooting it began to reboot usually daily or many times a day. A week ago on Saturday it rebooted and began to loop from splash screen and back off. After many restarts it went into the factory recovery and no options would work and the screen forever went black. It has been charged for days, no button combinations work, except when plugged into the computer while holding the down vol it will load the hsusb drivers will sometimes load, and occasionally when connected to the computer or wall charger the green led will light. So I took the phone into verzion and they see the same results and attempted to charge it with both a cable and wireless, same results. So they shipped a new unit to me and before shipping this old one back to them I have a few questions for ones of you that may know the answer:
Anything I can do to restore it to stock? I assume no from my research
Will they discover its rooted?
If so what will be the resulting action?
Thanks for taking the time to read this.

Hi..
It's just a guess, but I don't think they waste any time trying to figure out what happened, specially since they already gave you a new unit. I would say, Don't bother
Enviado desde mi XT1080 mediante Tapatalk

ZMaissi said:
Hi..
It's just a guess, but I don't think they waste any time trying to figure out what happened, specially since they already gave you a new unit. I would say, Don't bother
Enviado desde mi XT1080 mediante Tapatalk
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Click to collapse
Thanks, that is sort of what I was thinking. I suspect the boot partition is corrupt. But, wasn't sure being a new customer with Verizon.

Hey can you link me something about how you downgraded your droid ultra from SU6-7.2 to SU6-7

LOL, just flash SU6-7 (CFC-obakem_verizon-user-4.4.4-SU6-7-release-keys.xml) with RSD-Lite. That's the easiest way.

rfunderburk39 said:
Background, I have a Droid Maxx that I purchased/leased from Verizon, that arrived with 6-7.2. I downgraded to 6-7 and rooted. From the time of purchase the phone would reboot a few times a week. After rooting it began to reboot usually daily or many times a day. A week ago on Saturday it rebooted and began to loop from splash screen and back off. After many restarts it went into the factory recovery and no options would work and the screen forever went black. It has been charged for days, no button combinations work, except when plugged into the computer while holding the down vol it will load the hsusb drivers will sometimes load, and occasionally when connected to the computer or wall charger the green led will light. So I took the phone into verzion and they see the same results and attempted to charge it with both a cable and wireless, same results. So they shipped a new unit to me and before shipping this old one back to them I have a few questions for ones of you that may know the answer:
Anything I can do to restore it to stock? I assume no from my research
Will they discover its rooted?
If so what will be the resulting action?
Thanks for taking the time to read this.
Click to expand...
Click to collapse
Possible input hopefully it helps with your issue. Something similar has happened to me, but it was not software related. I am BootLoader Unlocked, but the only mod is for tether.
My phone would continuously reboot, but all I ever see is a black screen. sometimes when it stops rebooting the phone was actually powered on and responds to my voice commands, rings from calls, and notifications sounds work, but black screen.
My issue was actually due to the screen/LCD connection getting a little loose . Tech took phone apart disconnected and reconnected my screen, and problem solved. No more boot loops nor black screen.
It happened to me again a few months later, but I had dropped the phone a couple of times, which probably caused the loose screen connection a second time. After getting fixed again, I have had no issues, but then again, my Maxx also hasn't had any bad falls.

Mangu said:
Possible input hopefully it helps with your issue. Something similar has happened to me, but it was not software related. I am BootLoader Unlocked, but the only mod is for tether.
My phone would continuously reboot, but all I ever see is a black screen. sometimes when it stops rebooting the phone was actually powered on and responds to my voice commands, rings from calls, and notifications sounds work, but black screen.
My issue was actually due to the screen/LCD connection getting a little loose . Tech took phone apart disconnected and reconnected my screen, and problem solved. No more boot loops nor black screen.
It happened to me again a few months later, but I had dropped the phone a couple of times, which probably caused the loose screen connection a second time. After getting fixed again, I have had no issues, but then again, my Maxx also hasn't had any bad falls.
Click to expand...
Click to collapse
In the case of my phone, you could hold the power button in for a long period of time and then release and still nothing, not a flicker. I did not try voice commands, not a bad idea, but I did not want to open the phone due to the fact it was being replaced (further risking a decline on replacement).
On a similar note, the new unit seems to reboot at least once daily.

Related

[Q] Scary Experience With HTC One M8

As I'm writing this, my phone just came "back to life". I'm going to explain what happened...
... I'm on the train commuting to work. I was texting my wife to let her know that my boss ha approved me using 4 hours of leave to skip out of the office early so we can start our holiday weekend early. After I send my last text, my phone times out as normal. It vibrates, and this is where it gets weird...
... I take my phone off my belt to look at the text message I thought I received (vibration alert). I double tap the screen to wake the phone and I get nothing. I press the power button and get nothing. I thought that maybe the battery drained and was dead, so I plugged in my external battery... and get nothing.
I get to my cubicle and immediately plug it in and tap the power button to see if the recharge indicator comes on. Nothing.
I press and hold the power button. Nothing.
I press and hold the power and down volume buttons. Nothing.
While I'm typing this message, my phone vibrates and the HTC & Verizon boot animations start. The phone had about 23% battery life (after it booted) and is currently charging and at 28%.
Everything appears to be normal now, but that was not something I expected to happen this morning. I thought my phone was dead.
I'm running the stock ROM and kernel, but the phone is s-off'ed and perma-rooted using the guides in the forums (weaksauce, firewater, TWRP recovery). I'm not sure what happened.
Has anyone experienced anything like this before?
ricarpe said:
As I'm writing this, my phone just came "back to life". I'm going to explain what happened...
... I'm on the train commuting to work. I was texting my wife to let her know that my boss ha approved me using 4 hours of leave to skip out of the office early so we can start our holiday weekend early. After I send my last text, my phone times out as normal. It vibrates, and this is where it gets weird...
... I take my phone off my belt to look at the text message I thought I received (vibration alert). I double tap the screen to wake the phone and I get nothing. I press the power button and get nothing. I thought that maybe the battery drained and was dead, so I plugged in my external battery... and get nothing.
I get to my cubicle and immediately plug it in and tap the power button to see if the recharge indicator comes on. Nothing.
I press and hold the power button. Nothing.
I press and hold the power and down volume buttons. Nothing.
While I'm typing this message, my phone vibrates and the HTC & Verizon boot animations start. The phone had about 23% battery life (after it booted) and is currently charging and at 28%.
Everything appears to be normal now, but that was not something I expected to happen this morning. I thought my phone was dead.
I'm running the stock ROM and kernel, but the phone is s-off'ed and perma-rooted using the guides in the forums (weaksauce, firewater, TWRP recovery). I'm not sure what happened.
Has anyone experienced anything like this before?
Click to expand...
Click to collapse
Same thing happened to me on Wednesday. Stock ROM, S-Off, perm root and a few minor modifications. Screen timed out as normal after a little bit of usage and about 40% battery life left, went to pick it up and turn it on and it was completely dead, for what ended up being about six hours or so. Called Verizon to have my old phone reactivated until I figure out what I'm going to do. Tried everything from pressing combo of buttons, charging, adb commands, no luck. HTC one came back on after I plugged it into the wall and held power. So I called Verizon to reactivate it. Verizon offered me a brand new device since I am still within my 2 week period for a return. I have until this Saturday to return the device, but everything has been fine these past couple days. Still not sure what I'm going to do. It's almost as if the device was completely stuck or frozen until the battery died, then when I plugged it in again it powered on and showed 1% charge. It might also have something to do with Verizons new XLTE. Either way, scared the crap out of me and I was pretty frustrated for awhile. Never experienced this before and I've been rooting and ROMing devices for about 4 or 5 years.
Thought I would add, that I was sitting next to my fiance and within the 5 minutes that this happened to my device, her old samsung stellar, which is rooted and rom'd, started vibrating and was stuck vibrating for about 15 seconds before she picked it up and turned the screen on. Very strange.
Happened to me as well. It was just one time a couple weeks ago. It did this in the middle of the night, while it was on the charger for sleep. I woke up and wanted to check the time and could not wake the phone with any gestures or button press combinations. I ended up having to hold down or up (don't remember which) plus the power button and the phone eventually turned on. Sucked because I doubt my alarm would have went off.
I haven't had this with my M8, but I've had it happen in the past with my Dell Streak 7 tablet. It was a software problem. Basically like an app not responding but on a system level. Only way to fix most times was to reset.
question I have. Did you give Verizon superuser permission on there app... As my understanding goes. Verizon sends a signal to phone to get updates on your status.. This info came from a verizon rep. I dont know how true it is.. But we all know it wont surprise us. As there always getting into are pockets..
blazinandroid1 said:
question I have. Did you give Verizon superuser permission on there app... As my understanding goes. Verizon sends a signal to phone to get updates on your status.. This info came from a verizon rep. I dont know how true it is.. But we all know it wont surprise us. As there always getting into are pockets..
Click to expand...
Click to collapse
Do you have a citation for this?
I'd be interested to know if this is true or not. I doubt it, but I wouldn't be surprised.
Kuuroki said:
Do you have a citation for this?
I'd be interested to know if this is true or not. I doubt it, but I wouldn't be surprised.
Click to expand...
Click to collapse
Not sure why, but the Verizon app definitely asked for root permissions after its last update which I most assuredly denied.
Beamed from the holodeck of my Nexus 7 FHD.
blazinandroid1 said:
question I have. Did you give Verizon superuser permission on there app... As my understanding goes. Verizon sends a signal to phone to get updates on your status.. This info came from a verizon rep. I dont know how true it is.. But we all know it wont surprise us. As there always getting into are pockets..
Click to expand...
Click to collapse
I did grant permission at first without thinking about it, until I immediately thought why the hell is Verizon asking for root, so i went into the superuser app and permanently denied permission. It was days before this happened to me.
Verizon app asking for su perms? that is crazy, I would never allow that, they can only get information they cannot get from a phone that doesn't have SuperUser access, I just wonder what.. is this perhaps a new method to try and track those that are sending back defective devices that are S-OFF? As we most know, we can send back an S-OFF phone and you *should* have no issues. I wonder if this new SU thing, flags your account and they start checking our phones? Not really sure how badly they care about rooting and the extent Verizon will go to, to stop us from doing it, especially with the new Edge plans and having to give the phone back? I would think the process of making it a certified refurb would flash back any rooting of the phone back to stock, but who knows.
I actually didn't have what the OP had, but did have a scare, but is expected as I am running beta AOSP ROM.
I updated AdAway and did a reboot, went to the bathroom, came back and the phone was still rebooting, so I got confused, so I watched the phone and it was in a boot loop, I thought, strange, so I held volumeup and power to get me into bootloader, then into recovery. I decided to wipe and restore a nandroid. This is where it got interesting. I tried to restore - reboot, try to adb sideload ROM - phone reboots. not good..
I did the RUU that was put together, and luckily I was able to re-flash my TWRP recovery and it did load my nandroid without reboot so I believe I am good to go, but I wonder if all this weirdness does have anything to do with XLTE, or just a coincidence.
hgoldner said:
Not sure why, but the Verizon app definitely asked for root permissions after its last update which I most assuredly denied.
Beamed from the holodeck of my Nexus 7 FHD.
Click to expand...
Click to collapse
Interesting..I run paranoid android on my One, and as such, have gotten rid of the Verizon bloatware.
That's slightly worrying. Verizon scares me sometimes.
In my mind, this validates my decision to go over to the CM11 nightlies and never look back.
Happened to me a couple times I just hold both volume keys then power till it restarts to simulate a battery pull cuz I always assumed it just got stuck in sleep
Sent from my HTC6525LVW using XDA Premium 4 mobile app
I've had this happen a couple times with my M8. The first time it made me late for work because my alarm clock didn't go off. Just last week I woke up and unplugged it from the charger. When I looked at the phone I noticed that the green charging light was still on solid even though the phone wasn't plugged in anymore. I held the volume keys and the power button and eventually got it to start back up. It's concerning, but I don't want to return my phone because I have an expensive Spigen glass screen protector on it. I guess I'll just hope it's a software issue and HTC will eventually get it sorted out. I'm currently running CleanROM and the CodeCraft_Final kernel.
I was quickly able to avoid the Verizon root perms. First of all I always recommend disabling play store auto update. I very rarely update apps unless the update fixes a direct issue I am having. Once I heard about the root perms, I disabled the app in settings and carried on the s off process (eventually). I then searched carefully for a ROM w/o my Verizon included and flashed cleanrom and that's where I'm at now. All these threads are making me scared to reboot my device lol. Only hope I have in finding some info about this is a rogue Verizon employee
Sent from my HTC6525LVW using Tapatalk
It isn't necessary to hold both volume keys, just volume up and power.
Some kind of an issue with Verizon bloat acting up?
I disabled most of Verizon preinstalled bloat and I've never seen this issue.
andybones said:
Verizon app asking for su perms? that is crazy, I would never allow that, they can only get information they cannot get from a phone that doesn't have SuperUser access, I just wonder what.. is this perhaps a new method to try and track those that are sending back defective devices that are S-OFF? As we most know, we can send back an S-OFF phone and you *should* have no issues. I wonder if this new SU thing, flags your account and they start checking our phones? Not really sure how badly they care about rooting and the extent Verizon will go to, to stop us from doing it, especially with the new Edge plans and having to give the phone back? I would think the process of making it a certified refurb would flash back any rooting of the phone back to stock, but who knows.
I actually didn't have what the OP had, but did have a scare, but is expected as I am running beta AOSP ROM.
I updated AdAway and did a reboot, went to the bathroom, came back and the phone was still rebooting, so I got confused, so I watched the phone and it was in a boot loop, I thought, strange, so I held volumeup and power to get me into bootloader, then into recovery. I decided to wipe and restore a nandroid. This is where it got interesting. I tried to restore - reboot, try to adb sideload ROM - phone reboots. not good..
I did the RUU that was put together, and luckily I was able to re-flash my TWRP recovery and it did load my nandroid without reboot so I believe I am good to go, but I wonder if all this weirdness does have anything to do with XLTE, or just a coincidence.
Click to expand...
Click to collapse
I am a little disappointed.. you didn't take your phone with you into the bathroom? Lol. this happened to me after I tried an aosp Rom for the first time then went back to my stock rooted with soff and thinking about it now I accidentally allowed root permission to Verizon application which I quickly disabled in su. I didn't think much of it considering I thought it was something I had done or maybe battery died but it only lasted about 5 minutes rebooted and I was good. I remember on a previous HTC phone if you had a bad Rom and radio/kernel combo the phone would act vertually dead even if the battery was fully charged.
This just happened to my M8. I rebooted it and it didn't reboot. When plugged in, the LED didn't come on. Rooted, S-OFF, running pretty close to stock ROM with an unvervolted, overclocked kernel. I've let the phone sit for about 24 hours now. Have ordered a warranty replacement, but may try once or twice more to see if it springs back to life. Very strange. Can't get into hboot or any other key combination. For all intents and purposes it is a brick. (If it can't register a charge, it won't take adb).
Even if it does come back from the dead, I'm not taking a chance and swapping it out.
UPDATE: Truly bizarre. Returned to life and rebooted in response to power-volume up about 26 hours later. Battery had dropped from 80% to 40%. Rebooted like nothing had ever happened. Editing this on it now.
This happened to my first m8, what I believe is happening is they are going into the bootloader, but the backlight is off. I didn't notice until I held it under a bright light and saw there was something in the screen. Afterwards I was able to navigate to reboot the device. Or you can try simulating a battery pull. Just something to try before you write your baby off as dead.
Sent from my HTC6525LVW using XDA Free mobile app
Sounds like SOD.

Emergency! Please help!

So, I was just browsing on my phone, as usual, when all of a sudden it made a loud beep then shut off. It tried to restart itself, but after the LG logo popped up, gray lines came up all over screen, like an old TV that wasn't getting enough reception, and it shut off again: for good. It will not even attempt to come back on or even boot into recovery. It's just completely dead. Plugging it into a charger makes no difference and neither does removing and reinserting the battery. It is rooted and unlocked, but I did that around six months ago. It is still running the stock ROM. I have never put a custom ROM on it. I have not done anything unusual with it. I've just been using it normally. I tried to Google what happened, but couldn't find ANYTHING. I'm praying it's the battery, but will have to order one from Amazon and wait as there's nowhere to get one in my rural area. Has anyone ever heard of this?? A very loud beep an then completely dying?? Please, please help!!!
Celeste8157 said:
So, I was just browsing on my phone, as usual, when all of a sudden it made a loud beep then shut off. It tried to restart itself, but after the LG logo popped up, gray lines came up all over screen, like an old TV that wasn't getting enough reception, and it shut off again: for good. It will not even attempt to come back on or even boot into recovery. It's just completely dead. Plugging it into a charger makes no difference and neither does removing and reinserting the battery. It is rooted and unlocked, but I did that around six months ago. It is still running the stock ROM. I have never put a custom ROM on it. I have not done anything unusual with it. I've just been using it normally. I tried to Google what happened, but couldn't find ANYTHING. I'm praying it's the battery, but will have to order one from Amazon and wait as there's nowhere to get one in my rural area. Has anyone ever heard of this?? A very loud beep an then completely dying?? Please, please help!!!
Click to expand...
Click to collapse
It could be the battery. But sounds like your phone is dead.
Sent from my iPhone using Tapatalk
Celeste8157 said:
So, I was just browsing on my phone, as usual, when all of a sudden it made a loud beep then shut off. It tried to restart itself, but after the LG logo popped up, gray lines came up all over screen, like an old TV that wasn't getting enough reception, and it shut off again: for good. It will not even attempt to come back on or even boot into recovery. It's just completely dead. Plugging it into a charger makes no difference and neither does removing and reinserting the battery. It is rooted and unlocked, but I did that around six months ago. It is still running the stock ROM. I have never put a custom ROM on it. I have not done anything unusual with it. I've just been using it normally. I tried to Google what happened, but couldn't find ANYTHING. I'm praying it's the battery, but will have to order one from Amazon and wait as there's nowhere to get one in my rural area. Has anyone ever heard of this?? A very loud beep an then completely dying?? Please, please help!!!
Click to expand...
Click to collapse
Normally when battery goes on these things they just keep rebooting u nles plugged in and even when plugged in sometimes they stll reboot

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

Poco X3 NFC - Can't access bootloader, fastboot or system (bootloop)

Hi. My close friend has this issue. I'm posting this because she can't figure it out by herself. A month ago, her phone downloaded an update and she installed it. Since then, the phone has restarted by itself without any reason, just random restarts and the frequency of restarts was more frequent with each day. Fast forward to this day and the phone is constantly turning up and shows the POCO logo and restarts by itself. This loop is not ending until the battery is completely dead. When trying to access fastboot or recovery mode, she can get there but only for few seconds (until the device restarts again) which is not enough time to make any changes / factory reset. She did not accessed developer tools in system, so the bootloader is still locked. Holding down power button does nothing. ONE SINGLE UPDATE screwed up whole phone. Can't do ****. There's no SD card or SIM card in the slot. Is there any "hack" to stop the phone from restarting itself? Note when the battery is completely empty and she plugs the charger, the whole nightmare starts again. I'm lost. Did you guys have any ideas what to do? Or is the repair centre only solution? (She cracked glass of the display, i'm not sure if that voids warranty. [it's not glass COVER, it's the glass which is part of the display])
Is this device unlocked? If not, then RMA.
If it is, my best guess is to get the device into recovery (or fastboot?) and immediately connect to PC.
If it holds, leave it there as it will charge, although at much slower rate.
When charged, use TWRP to try to reboot to system.
If it doesn't work, then factory reset.
Sadly, i can not get to recovery because in about 2 seconds the device will reboot. There's literally no time to make any changes - factory reset. Also the device is not unlocked. I hope RMA accept the phone even though it has cracked screen . Thanks for response anyway
Then RMA it is. If you're in EU they'll have to take it, even with the cracked screen.
But does the reboot happen even when connected to PC? Two seconds is enough to plug it in if you're fast...
Yeah, we tried every possible idea we can think of. Pressing the toggle button from different angles with different intensity to make sure it isn't stuck inside, covering up the proximity sensor (yeah makes no sense but even that we tried, lol). Tried with connected to PC as with classical charging brick. No change. Back in those days where smartphones doesn't have unibody construction and you were able to take down the back cover and remove battery it was way simple. Nowadays it's not possible to stop the phone from booting itself until battery is completely empty. My friend says the problem started about month ago, when the phone annouced that there is an update available so she downloaded it and installed it. Before that, there was no problem with the phone whatsoever. Maybe it's caused by some kind of virus but IDK which apps she was using. She didn't have rooted phone not unlocked bootloader in developer tools. Also i googled that it may be caused by "Airtel Thanks" app which she didn't have installed aswell. I will keep this thread updated as what happend to the phone cause i'm also interested what went wrong and to help future users who will struggle with this problem a solution. Thank you.
CaptainFedora, did you solve the problem? I have the same issue...
Yeah, actually. Sorry for not posting the answer although it was definitely her fault. It was the power button being pressed down (which made continuous bootloop). But the button was somehow pressed deep into the phone's body. So complete dissasembly was needed.
Btw. my friend lives in other country so we discussed this problem over internet. If i could have the phone physically with me i would definitely know what was the problem.
Hi.
Yesterday I had the same problem, the device kept restarting every 10 seconds, it didn't even come to any screen besides the first one with the POCO logo in yellow.
Things I tried that did NOT work:
restart
hard restart
fastboot (it did enter the fastboot mode, but only showing the picture of the 2 robots and after 10 seconds restarting again to the POCO logo image)
plug it to power
plug it to computer
After 3 hours of continuous restarting and trying anything I could find in the internet and I could imagine of (except extracting the battery because it seemed complicated and difficult to revert), I tried randomly something that miraculously worked...don't ask me why.
pressing the power button shortly and quickly around 30 times (it might have worked after 10 or 20, but I just kept doing it a little longer
Afterwards it just started as if nothing had happened...doesn't make any sense, but I just wanted to tell you in case you are in a similar situation and desperate to not lose all the images and videos as I was yesterday.

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