my phone is stuck in bootloop, but sometimes im able to turn it on - Android Q&A, Help & Troubleshooting

i had my phone for about 2 years, it has been rooted ever since i got it and its running custom rom and custom recovery CM 13 on android 5.0.1 and TWRP . about a week ago i was charging my phone, when i unlocked it, i'm unable to go to the home screen because whenever i do that, google app crashed and the phone redirected me to the recently used app tabs, then i tried to reboot my phone and it went to safe mode but then i restarted it and its stuck on bootloop. so i let it be for a while, then it show the "android is starting" tab and "optimizing app number "xxx" out of "xxx" and after it finished, again it is stuck in CM's logo. however, then i put my phone to fastboot an restarted it and i dont know, it turned on again after 2 boot loops. a week after, my phone ran out of battery so i tried to turn it on but it wont , after reading threads on the internet, it suggested me to erase the cache and the dalvik cache. so i did and it turned on. today, i ran out of battery again and i erased both cache and dalvik cache, but it wont turn on.. i have no idea what's going on with my phone, and im a newbie so please go easy on me thank you.

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[Q] Stuck at boot after upgrade Revolution HD

Hey guys,
I just upgraded to Revolution HD 32.0 (coming from 31.0).
Here's what i did.
Boot into recovery.
Clear cache+dalvic-cache.
Install zip from sd-card (select revolution hd 32.0)
Started Aroma installer, left everything pretty much default, just removed some of the samsung junk.
After the install was finished i cleared the cache again and rebooted the device.
It started with the start up logo and after a minute or so "Android upgrading..." with the applications counting.
After that it shows "Finishing boot"
Then nothing, it stays at that for like 5 minutes, then reboots and stays stuck at the samsung logo.
So i decided to boot into recovery, whipe caches and fix permissions and reboot again.
Same thing happened as before.
So i wanted to do a full clean install of the rom, wiping all userdata.
Surprise! Can't get into recovery or download mode anymore.
Took out battery for a few minutes and put it back in.
Still can't access download mode or recovery with vol+menu+pwr...
Does anyone know what's going on, or better, how i can possibly fix this?
I have no idea how to access my device now to make changes...
Thanks a lot!
If you can't get into bootloader with vol down, home and power button then you have a brick, service centre repair required.
Worth trying a USB repair jig to get download before paying for a repair .
jje

Samsung Galaxy S2 not booting

I rooted my phone without any trouble for months, and its been working just fine, until now! Then, I had to do a factory reset. The normal procedure, SETTINGS> PRIVACY> factory reset. The phone then never got past the boot logo. It starts to load, and just gets stuck at the Samsung logo, and nothing else. there's two lights glowing from the capacitive buttons, and that's all. I'm on 4.1.2 JB stock rom. Later, I tried to enter recovery mode, and did a wipe, and cleaned cache partition also. AND, the phone just sprung to life, the whole first time set up thing. I started filling in stuff and the phone just shut down again, and if I tried to reboot again, it doesn't get past boot logo. But if I wipe n do it, it happens but shuts down immediately Please help!!
Sent from my GT-I9003 using xda app-developers app
Boot into download mode, get a stock rom from Samfirmware, flash it with Odin (How ? Thread stickied near top of Q&A).

Lenovo A820 won't start

Hello everyone!
I have a Lenovo a820 with Lambda rom 2.4v.
I'm using it for a couple of weeks now with this last version, and everything was fine, until suddenly it froze for a while, I unplugged the battery and plugged it again, and what I notice was that the phone restored itself to when after I installed the rom (meaning all of the apps were gone).
So I tried going into Google play, installing some apps back, and I get this error -24 telling me its unable to install the app, happened with any app I tried. so after trying a few suggestions from the internet about this error, I decided to format it and install the rom all over again.
I go back to recovery mode with CWM, try to install the lambda rom like I did before, and in the middle of the installation it reboots and gets stuck in the "lenovo" screen like when you boot it. so after waiting for a long time I unplugged and plugged the battery again, went through the procedure again this time it installed it 100% rebooted so it would boot with the mod, and again, it freezes at "lenovo" start screen unable to boot.
went on recovery mode, formatted system, data, emmc, everything... I think that's the issue here. but im not sure.
After that, tried to install again with the same problem.
The problem now is. it won't even start I press the on/off button to start it normally, and I dont even get the "lenovo" screen, I tried going into recovery mode and no luck.
It's like the phone is dead! Although I have another Lenovo A820 and I tried the battery, and its 60% so that's not the battery.
Do you guys know any tricks? or any tools that I could use to get my phone running again?
I would appreciate it very much, any help you can give.
Matt.
MatWho said:
Hello everyone!
I have a Lenovo a820 with Lambda rom 2.4v.
I'm using it for a couple of weeks now with this last version, and everything was fine, until suddenly it froze for a while, I unplugged the battery and plugged it again, and what I notice was that the phone restored itself to when after I installed the rom (meaning all of the apps were gone).
So I tried going into Google play, installing some apps back, and I get this error -24 telling me its unable to install the app, happened with any app I tried. so after trying a few suggestions from the internet about this error, I decided to format it and install the rom all over again.
I go back to recovery mode with CWM, try to install the lambda rom like I did before, and in the middle of the installation it reboots and gets stuck in the "lenovo" screen like when you boot it. so after waiting for a long time I unplugged and plugged the battery again, went through the procedure again this time it installed it 100% rebooted so it would boot with the mod, and again, it freezes at "lenovo" start screen unable to boot.
went on recovery mode, formatted system, data, emmc, everything... I think that's the issue here. but im not sure.
After that, tried to install again with the same problem.
The problem now is. it won't even start I press the on/off button to start it normally, and I dont even get the "lenovo" screen, I tried going into recovery mode and no luck.
It's like the phone is dead! Although I have another Lenovo A820 and I tried the battery, and its 60% so that's not the battery.
Do you guys know any tricks? or any tools that I could use to get my phone running again?
I would appreciate it very much, any help you can give.
Matt.
Click to expand...
Click to collapse
The boot.img must be wrong try rom for your phone.
Sent from my Moto G

[Q] Nexus 7 Stuck in Weird Bootloop

My Rooted Nexus 7 was working perfectly. Now I am not sure If it is Soft Bricked or something else is wrong with it, It was charging one day and I took it off one micro usb charger and put it on another Nexus 7 charger. I went back and turned it on, Now it was stuck in bootloop, I have seen bootloops before, but not like this. It turns on and goes to the lock screen, then after a few second it freezes then restarts. I have been able to quickly log in boot into safe mode but it still freezes and restarts, I made it to the app menu once and then it sad , Unfortunately Launcher has stopped, I have cleared the cache and dalvik cache and nothing works, I have bootloader version 4.1.3 and CWM version 6.0.1.9, I have tried to format tablet and factory reset with cwm recovery but when I turn it back on I still see my stuff and I still reboots, I have tried to restore from a backup from a while ago with cwm but it fails. I tried to use nexus toolkit but I dont remember my version and I cant check, I gave it a guess but It can not find my device when plugged in, even in recovery mode, It said something about fastboot but i think i did that but I am not 100% sure what it is, I need to get this workig again fast.

Moto X 2013 (xt1058) wont boot

I've had CM12/12.1 installed on my motoX 2013 for a few months now and have had no problems. Last night when i tried to type in my password my phone would just freeze. I restarted it and eventually i got in and went to disable the password. On the way there it crashed again and now when ever i try to start my phone it just gets stuck at the warning bootloader unlocked screen. I can get into fastboot and when i go to my recovery it just gets stuck on the teamwin screen. This happened without me changing anything, no update or anything. I reflashed my recovery and i was now able to access it i cleared my cache and dalvik cache and was now able to access my phone. After using it around a few minutes after my phone crashed again and now i have the same problem, except the dalvik cache wont wipe. What do i do? :crying:

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