A couple weeks ago my friend dropped my phone and ever since it has been shutting off every once in a while for about 3 hours. Once I charge it it is usually fine but it has taken longer and longer to turn back on. When I plug it in a red light flashes in the top right and then the screen flashes whhite for a second, after I do this 15 or 20 time it usually works again. Any ideas what i could do to fix this with out taking it into the shop?
