Sol 26 randomly reboots, and now progressed into a boot loop. - Xperia Z3 Q&A, Help & Troubleshooting

Hi Friends, as the title says I have a problem booting my Z3(sol26), and I wish to save my data and photos on the phone.
I didn't root or flash anything on the phone, and haven't updated for over 2-years, the recent changes on the phone are installing and uninstalling the WeChat app.
Symptoms:
- The first sign of problem started two days ago, the phone randomly reboots while I am using it. Although it is a rare occurrence, I didn't pay too much attention to it.
- Then yesterday, it randomly reboots again, but this time, the reboot process did not complete: the phone would reboot again after showing the boot animation (like this: i dot imgur dot com/AhF5Kso.png). I plugged the phone into a charger, then it magically completes the reboot. The random reboot happened 2 times yesterday, each time I solved by plugging in the USB cable to charger.
- So today, I decided I should do a backup, but things got worse too fast. The phone now enters a reboot loop, each loop lasts only 5 seconds or so, just enough time for the sony logo to show up. And plugging in the USB cable doesn't help anymore.
What I have tried:
1. Holding power and volume+ key, gets three vibrations and turns phone off. No effect, boot loop continues after powering on.
2. Press the reset button in the sim-card slot, gets three vibrations and turns phone off. No effect, boot loop continues after powering on.
3. Opened up the back cover, removed battery connection, and reconnected it. No effect, boot loop continues after powering on.
4. Plugging in the USB will cause the phone to power on and enter reboot loop.
5. Charging the phone using magnetic contact while it is powered off will not cause boot loop, the battery logo and percentage show up. Now the phone is 90% charged.
At this point, my wish is to get the phone to boot successfully one more time, so that I can savage the data. Please help me.

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[Q] Nexus 5 won't boot up and reboots. Power Button problems

Noticed very erratic behavior on the Nexus 5 :
The phone automatically shuts down.. tries to restart and reboots once it reaches the Google logo. It then continues in a reboot loop.
It got out of the reboot loop, but now it's completely dead. No charge indicator. Won't start at all. Cannot even get into the recovery.
Happened once before. Same issue: reboot loop + dead phone but it started working after a while.
What should I do? The battery was charged when it died.
Also, before it died, whenever I pressed the power button to turn off the screen, the screen went off, but then came on automatically again.
Techguy18 said:
Noticed very erratic behavior on the Nexus 5 :
The phone automatically shuts down.. tries to restart and reboots once it reaches the Google logo. It then continues in a reboot loop.
It got out of the reboot loop, but now it's completely dead. No charge indicator. Won't start at all. Cannot even get into the recovery.
Happened once before. Same issue: reboot loop + dead phone but it started working after a while.
What should I do? The battery was charged when it died.
Also, before it died, whenever I pressed the power button to turn off the screen, the screen went off, but then came on automatically again.
Click to expand...
Click to collapse
I'm currently experiencing the same problem, my Nexus 5 is apparently has a stuck power button, it'll power up and off again constantly and attempting to go into the bootloadeer wont help as the power button being stuck it starts up immediatly i cannot change the option quick enough to go into recovery mode.
I'm thinking the only option here is to send it back to Google and have it swapped or repaired.

[HELP] Stock 5.0.1 phone power up issue

Hello,
I flashed the latest LRX22C image on my nexus 5 today.Had flashed it clean,wiping data,cache and system etc except the Internal Storage.Then I flashed the SUPERSU 2.37 ZIP .Everything was fine for about 4 hours.Then suddenly when I pressed the power button to turn the screen off,it was not turning off and the "Switch off" mode was popping up instead .Then, when I got a call,it switched off.The phone won't turn on again.It starts,the Google Boot Splash appears and the bootanimation starts for like 2 seconds and it switches off.Same thing for bootloader mode.
Please Help me!
EDIT: Now its turning on by itself and switches off in 2 seconds!
Sounds like a bad power switch to me, but of course that is just my opinion. :good:
sounds like a mech issue.
legit isue
I have the same problem on mine now... Basically my phone powered down around 45%. Battery. At the time i thought it was dead... But it wasnt. When i would plug into external power, either usb or through wireless charging it would power cycle continuously at the android splash screen.... (1 to 2 second intervals - even if i booted into fastboot) Interestingly it would never go to the battery charging mode. But automatically boot on charge... It did this for about 6 hours then i gave up and left it unplugged for a day. I plugged it back in and it started power cycling again, however this time on its third boot it came back to life . thats when i discovered i still had 40% battery... I dont know what exactly made it boot but it did. Oddly also on boot, it started optimising apps and finishing install again. I checked the md5 before I installed the update so no issue there. Since it powered up i have powered the phone off using the power button long push and let the phone power down. After doing this when i plug the phone in to usb charge it goes to the charge screen. No issue. That said, if i try to power up while tethered and charging it will not allow it. It just stays at the charge screen. As soon as i unplug the usb the power button allows the phone to power up and work... When booted up it charges as normal when plugged in. Im convinced there is an issue with the power management drivers or drivers for the button controls. My phone worked fine until the 5.0.1 update was installed. On my nexus 5. Anyone else or just us two? Ive had a hard time finding people posting on this issue.

Boot loop, dead battery, no recovery

Thanks for any help in advance.
My Nexus 5 device is unable to boot stock or recovery image. It's a locked bootloader, and stock ROM from my wireless carrier. I charged it with a 2 amp capable charger.
Symptoms: preceding the failure , there were strange slowdowns, apps crashing, and inability to charge the battery over the course of a day. When the battery finally died, that was the last I saw my Operating System. Now, when it's plugged in to power, it indicates full charge. If the power button is pressed it will show the Google logo, then cycle back to the battery charged icon. If the power button is held, the battery logo is skipped and Google logo displayed repeatedly. If the down volume button is pressed in addition to power, I get the screen where I can chose the recovery loader, but then the process of Google logo and reboots persist.
If nothing else, I'd like to grab built-in SD card memory contents and strip out a bitcoin key with about $40 on it that I didn't get to back up before it failed.
What have I tried so far: basically everything above to generate those symptoms. I also tried opening the back, and pulling one of the top cover and unplugging the battery entirely. No effect.
Cheers all. :good:
what happens when you connect it to your pc?
Possible power button issue? You could open the phone, remove the plastic power button from the phone housing, reconnect everything, and then try to boot the phone.
When I connect it to the PC, it goes through the same fully charged loop until I hit the power button for 2S, then it boots. If I hold power, it boot loops; if I leave it alone it fully charged loops (regardless of battery being attached or not). If I remove power button and depress it manually, I get the same loop.
This is a refurb from Google, about 8 months old.

Completely stock Pixel 3 reboot loop

Hi,
Yesterday, I updated my Pixel 3 to the latest version of Android 10.
Today, my Pixel 3 was on like 3% battery, so I turned down the brightness. All of a sudden, the phone just turned off - black screen, and started rebooting constantly until the battery was completely dead. At home, I plugged it into the charger, waited a bit (phone kept rebooting) and after a while, I tried to boot / soft reset it multiple times. When I got to recovery mode and pressed one of the volume buttons to choose factory reset - boom, phone reboots. So, I tried Fastboot to at least get it recognized by my PC. It stays in Fastboot for a few seconds, then reboots.
Can anyone help me out? I need this fixed ASAP, I'm a delivery guy and need my phone to do my job
I had that once. Had to let the phone completely die, then keep it on charger for a few hours.
I got that problem yesterday too. Then I tried to stop the loop by holding Power button and up or down buttons. After that I entered Safe mode(not sure which of the two combinations worked), restart after and everything was fine.

Question Flashed from CN to WW. Battery read "100%" until it eventually died. Now it is stuck in a boot loop even after reflashing.

Hello, I flashed this phone from CN to WW using the `flashall_AFT.cmd` script. It worked fine except the battery indicator at the top would stay pinned at 100%. I ignored this and eventually let the phone die the next day while playing games on it. After that, the phone has been semi-bricked.
The phone does not turn on at all unless it is plugged into the charger.
If I plug the charger into the bottom port on the phone:
1. Android logo flashes for .2 seconds
2. Phone shuts off for 5 seconds
3. Steps 1-2 repeat until I unplug it again
If I plugin the charger to the side port on the phone:
1 The green charging circle with the lighting bolt shows up for a few seconds
2. It changes to the main boot screen
3. Phone shuts off for 5 seconds
5. Steps 1-3 will repeat until I unplug it again
I can still boot the phone into fastboot mode when it is charging from the side port. I used this to re-flash the phone using the `flashall_AFT.cmd` script again, but that did not solve the boot loop problem. What else can I try now to get the phone working again?
Update: I tried to flash it one more time using `flashall_AFT.cmd` with the 1.1.92 WW raw image. It completely froze while on `Sending sparse 'super' 6/14`. The phone no longer boots at all and does not connect to my computer. I just see a solid red light at the top of the screen when it is plugged in. If I hold both volume buttons and the power button all at the same time for about 10 seconds, the red light will briefly turn off, but that is all I can make the phone do at this point.
you'll probably need to use a 9008 rescue tool to have any chance at saving it at this point.... I'd say just sent it back to ASUS for a RMA to see if they'll do it for you

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