GS3 won't go past boot logo, no recovery or download mode

[AC Question]

Hey y'all, I've had a Galaxy S3 for about a year now and I recently flashed SlimKat on it. It ran fine for a week or so and then randomly turned off. Now when I try to boot the phone it says "SAMSUNG" then it starts the custom bootlogo and turns off after about 3 seconds. I can only get it to boot if I remove the battery and place it back in. I can make it into download mode for about 2 seconds, and I can get the boot logo for recovery mode. I do not have to touch my power button to access either of those modes.

 

[Sophia Zhao]

Hey y'all, I've had a Galaxy S3 for about a year now and I recently flashed SlimKat on it. It ran fine for a week or so and then randomly turned off. Now when I try to boot the phone it says "SAMSUNG" then it starts the custom bootlogo and turns off after about 3 seconds. I can only get it to boot if I remove the battery and place it back in. I can make it into download mode for about 2 seconds, and I can get the boot logo for recovery mode. I do not have to touch my power button to access either of those modes.

It's the problem of software, something damaged its system. You have to root the phone.