Why has my Galaxy S3 begun bootloops with a black screen?

[Hakki Dongel]

Galaxy S3 bootloops with black screen

After installing cm 10.2 on my s3, i used it several months flawlessly.
After that it got a black screen , but it went over by itself (i could still see a little bit in the dark,but not enough to recognize anything.) And after that it got into another black screen en keeps bootlooping... What can i do?

 

[GSDer]

Re: Galaxy S3 bootloops with black screen

Welcome to the forums!

The first thing to try is to remove the battery for a few minutes and then reinsert it - if the phone powers on (without you pressing the Power button) then you likely have a stuck Power button (the plastic piece that you press on) or the actual Power switch on the mainboard is malfunctioning. If that's what's happening then it may be necessary to open the phone to clean around the Power button or the microswitch on the mainboard.