Chosen Solution
My phone is about 5 years old. It went black in the middle of reading mail. If I remove battery and reinsert it lights up but goes no farther. It charges but goes right to 0. Might it simply need new Battery?
Black screen could be a sign of LCD damage. There is also a chance that your battery may be damaged and improper current flow is leading to phone turning off automatically. It is really easy to see battery status using a secret dialer code. Also try another cable and charger before a battery replacement. If you encountered the issue with a specific application, then it could be a problem with the software of your phone, try to uninstall or reinstall the apps.
