My phone wont turn on

[Android Question]

I don't know why but yesterday my phone was acting up so I turned it off but when I tried t turn it back on it wouldn't turn back on so I tried charging it because I thought it was dead but I fully charged it and still won't turn on!!!!!!!!Somebody help me!!!!!!!!!!!!!!!!!!!!

 

[Rukbat]

1) "Fully charged" means leaving it on the charger for at least 24 hours.

2) We don't know what model phone, what version of Android and what's been done to the phone (modded, flashed, dropped, etc.) so we can't guess what's wrong with it.