Chosen Solution
My aunt gave me two old phones she had for me to fix. They’re both Samsung Galaxy S2 and doing the same thing. I tried charging them, they wont turn on the screen but they will heat up. Tested the battery, it’s on 0 volts. Charged it without battery to see if the screen turns on, and nothing. Tested some components and they didnt give me the correct voltage either. I tested the q500 and the d501.
Dårk Søul Nëko the very first thing you need to do is to get a new battery. Right now you do not have any known-well starting point to troubleshoot. After that follow the troubleshooting to narrow it down
