Phone does not boot up. - Xperia SP Q&A, Help & Troubleshooting

I went to sleep and upon waking up found that my SP had switched off. I thought that my battery must have run out so plugged it in. It boots up to the Sony logo and shows the charging icon but then repeats the process over and over again.
I got it to boot up once but the battery shows 0% and there is a red coloured lightning bolt in the middle of the battery icon. I don't know what that means?? Then it switches off and the whole process is repeated...
I'm on XenonHd 8.1 rom. I don't think it is a software issue because the phone was running flawlessly and then suddenly this.... so bummed out. I really like this phone (using since 5years) and hope someone can help me.

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[Q] what exactly is going on? phone not turning on

Hello everyone,
So I am new to XDA forums and I have a few questions about the HTC Vivid. I just recently purchased a phone for cheap just to practice doing how to root and do certain task on phones. When I purchased the phone I knew that the phone was not working properly. When I tried to turn on the phone nothing happen but I saw that the screen did light up in a black screen. I took the battery out and checked the battery and the connection to the battery on the phone everything seems fined. When I put the battery back in and tried to turn it on nothing happened. Think it might just be a dead battery I charged it all night. While changing I noticed the phone led light was not constant it kept blinking and a screen showed up real quick and it looked like it booted into recovery real quick and shut off. It kept doing this by itself for a while. (Cycling) Then it finally booted into the white boot screen with the HTC Logo. I thought the phone was finally going to work but nothing happened it continued the cycling process again for a while. Thinking there was a possibility of fixing the phone I connected it with my PC and using both Windows and Linux. When I connected it with Linux (Ubuntu) nothing seems to happen. When I connected it with Windows it does the same thing as if i charged it. The orange led light blinks a couple times and then becomes solid for a bit and blinks again life it was Morse code. This time I see a black screen lighting up more and boots fewer times booting into recovery. I think it booting into recovery because I remember the CWM. Through all this process while connected with my computer I see that it is attempting to connect with my computer but then shut off. After approximately 8-10 minutes of cycling i get the white screen with the HTC logo again and then the cycle happens again.
My question is what is the problem with the phone? A few things that pop into my mind is probably just the battery is fried, the microusb is bad, or something went wrong during the process of flashing something onto the phone. I was very detailed about the problem and what I noticed because like I said I purchased this phone only to learn how to root and do other various things on a phone. Is the phone salvageable? I will post a video later if my detailed description didn't make sense or you just have to see it happening.
Wire tap said:
Hello everyone,
So I am new to XDA forums and I have a few questions about the HTC Vivid. I just recently purchased a phone for cheap just to practice doing how to root and do certain task on phones. When I purchased the phone I knew that the phone was not working properly. When I tried to turn on the phone nothing happen but I saw that the screen did light up in a black screen. I took the battery out and checked the battery and the connection to the battery on the phone everything seems fined. When I put the battery back in and tried to turn it on nothing happened. Think it might just be a dead battery I charged it all night. While changing I noticed the phone led light was not constant it kept blinking and a screen showed up real quick and it looked like it booted into recovery real quick and shut off. It kept doing this by itself for a while. (Cycling) Then it finally booted into the white boot screen with the HTC Logo. I thought the phone was finally going to work but nothing happened it continued the cycling process again for a while. Thinking there was a possibility of fixing the phone I connected it with my PC and using both Windows and Linux. When I connected it with Linux (Ubuntu) nothing seems to happen. When I connected it with Windows it does the same thing as if i charged it. The orange led light blinks a couple times and then becomes solid for a bit and blinks again life it was Morse code. This time I see a black screen lighting up more and boots fewer times booting into recovery. I think it booting into recovery because I remember the CWM. Through all this process while connected with my computer I see that it is attempting to connect with my computer but then shut off. After approximately 8-10 minutes of cycling i get the white screen with the HTC logo again and then the cycle happens again.
My question is what is the problem with the phone? A few things that pop into my mind is probably just the battery is fried, the microusb is bad, or something went wrong during the process of flashing something onto the phone. I was very detailed about the problem and what I noticed because like I said I purchased this phone only to learn how to root and do other various things on a phone. Is the phone salvageable? I will post a video later if my detailed description didn't make sense or you just have to see it happening.
Click to expand...
Click to collapse
OK, first thing to do is to charge the battery in an external charger. That is the *only* way to eliminate the battery as a problem. If the phone wont boot with a fully charged battery, see if it will boot into recovery mode. If you can't do that, it is quite possibly dead.

+ [Solution] Empty 0% battery bootloop on 4.3 Xperia T

I still didn't get my OTA in Croatia so I decided to try this. I came across an issue which wasn't present in official 4.1.2. and maybe someone had (and still has) it as well. I'm posting this here so that it's easier to find if anyone has this issue and wants to fix it.
I have installed 4.3 on my Xperia T with Locked Bootloader and everything worked fine. However, I have come across a issue and managed to solve it as well. Here's what happened and how I solved it, maybe it helps someone with same problem.
Today my battery drained to 0% and the phone shut down. Now when I plug it in to wall socket to charge, red LED goes on and it turns the phone on. Once Android boots I can see 0% in status bar and it starts shutting down again. Then it boots up again and loops like that. I remember that on 4.1.2. there would be a battery icon when it was completely empty and it wouldn't boot the system. Now it just loops. This didn't happen on official 4.1.2.
I have Googled for solutions and have tried this.
"1. Press and hold down the power key on the right side of the phone. If the battery status LED flashes red, try plugging the charger into the phone at the same time as you are pressing and holding in the power key.
When plugging the charger into the phone there is a risk that nothing happens – no red battery status LED as indication of charging, or nothing appearing on the screen.
If the charging doesn’t start, follow the instructions under To let the charger be plugged in for 24 hours.
2. If the charging starts, keep charging the phone until it’s fully charged. Indication of charging is that the battery status LED lights up in red, or that the SONY symbol appears on the screen and then the LED lights up."
Problem was that when I left it to charge (screen off, LED red) it would start booting again after a few minutes. When it started to boot, I would press volume up + power key to shut it down and keep charging. I had to do this many times (10 to 15) and it was very frustrating but it worked in the end. I decided to let it boot and voilà! it showed 1% battery and didn't start shutting down. Now it's charged to 2% and keeps on charging.
The lesson - don't EVER let your Xperia discharge below 1%, you'll have a world of problems.
I have the exact same problem, except that it doesn't even charge when my screen is off.
Great find! I used a separate way to get it to charge but I can assure you it gave me a world of pain! Thank you for sharing
What about the Xposed module DisableCriticalBatteryShutdown?
If or devices were no longer turning off again after booting when battery is 0%, the problem would be fixed, right?
Sent from my LT25i using xda app-developers app

[Q] Battery not charging. Stuck on Battery logo loop

So, here's what happened.
I have a N7000 and it's charger port stopped working a semester ago. So I bought a new one and replaced it. Everything went back to normal.
Now yesterday I was using my phone and it discharged (It discharges even while charging and browsing the internet for example), but I was talking with someone and I had to get back ASAP and conclude the conversation. So I took a older battery that's stuffed and pluged it in and finished what I was doing.
The thing is, now that I connect the newer battery (3 months old, original), I get stuck on a battery logo loop. The battery icon shows up with the circle that rotates in the middle, then the screen gets brighter, flickers a little (My phone always flicker at 25%~ battery) and goes black. Then it starts again and again in a loop.
The stuffed battery still works and is charging fine, with that said, I'm sure I don't have any problems with the charging port/cables/chargers.
I believe this has happened once before but I can't remember the procedure to fix it. Does anyone?
Thank you!
Aqualunguer said:
So, here's what happened.
I have a N7000 and it's charger port stopped working a semester ago. So I bought a new one and replaced it. Everything went back to normal.
Now yesterday I was using my phone and it discharged (It discharges even while charging and browsing the internet for example), but I was talking with someone and I had to get back ASAP and conclude the conversation. So I took a older battery that's stuffed and pluged it in and finished what I was doing.
The thing is, now that I connect the newer battery (3 months old, original), I get stuck on a battery logo loop. The battery icon shows up with the circle that rotates in the middle, then the screen gets brighter, flickers a little (My phone always flicker at 25%~ battery) and goes black. Then it starts again and again in a loop.
The stuffed battery still works and is charging fine, with that said, I'm sure I don't have any problems with the charging port/cables/chargers.
I believe this has happened once before but I can't remember the procedure to fix it. Does anyone?
Thank you!
Click to expand...
Click to collapse
It almost sounds from what your describing like the charger block (not the cable itself) is not sending enough power down the cable, I would try either a different block or even a 2 amp charger block just to make sure.

[Q] Question about CyanogenMod 11

Hello, XDA developers. As you may see, this is my first post, but I would like you to tell me what happened with my cellphone.
Something weird happened with my S Advance after I rooted it and installed CyanogenMod 11. I was playing on it, as I changed MinFree settings and overclocked the processor and wanted to check how the performance increased. Suddenly, the phone abruptly shut off without showing the traditional dialogue box that should appear.
When I took the phone to connect it to my battery pack I waited for like 5 minutes and the battery symbol never appeared; after that I tried to turn it on but it didn't work either. As soon as I arrived home, I connected a proper charger to the S Advance and, still, it didn't respond at all.
About one hour later I took the phone and now, when I tried to turn it on (in normal and recovery mode), it would only vibrate for a few seconds, as if it was actually turning on - with the difference that nothing was happening. The only boot mode that I could enter to was the download mode.
Saddened because I thought it was bricked, I came to my room and plugged it to my computer. The screen instantly showed the battery charging sign, and when I turned it on everything was normal. I used my wall charger to try, and it keeps working fine.
I understand that when a phone battery reaches 0%, and you try plug it to a charger you need to wait like 10 minutes to actually turn it on. But in this case was an hour! And when I finally turned the phone the battery was at 0%.
Could you tell me what happened (for potential future ocasions)?

Help - Screen goes black after boot

Hi guys, this morning I run into a problem. I noticed that my phone was turned off and when I tried to start it again the Sony Logo followed by the Android animation shows but then the screen turns black (I think the phone turns off).
When I connect a charger, the LED turns red for 1 second then goes black. And when the charging animation screen shows up, it does not animate, is frozen for a couple of seconds and then the screen goes black again. Worth noting is that the battery icon showing on the charging screen is green so perhaps there are some battery left.
I’ve flashed several different Android versions but the behavior is still the same.
So do anyone have any idea what I can try to do next? I would be very happy for any advises!
Thanks in advance,
Andreas
bobboviking said:
Hi guys, this morning I run into a problem. I noticed that my phone was turned off and when I tried to start it again the Sony Logo followed by the Android animation shows but then the screen turns black (I think the phone turns off).
When I connect a charger, the LED turns red for 1 second then goes black. And when the charging animation screen shows up, it does not animate, is frozen for a couple of seconds and then the screen goes black again. Worth noting is that the battery icon showing on the charging screen is green so perhaps there are some battery left.
I’ve flashed several different Android versions but the behavior is still the same.
So do anyone have any idea what I can try to do next? I would be very happy for any advises!
Thanks in advance,
Andreas
Click to expand...
Click to collapse
I think that your phone battery is drained fully and charging up. First try charing it with different and ordinary charger (not quick charger or fast charger) to charge it. Check that whether is charing or not. If charging charge it fully and flash stock rom with wiping caches & data. If it is not charging then take it to the authorised service centre.

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