My iphone turned off by itself and won't turn back on?

So I dropped my phone and it cracked so i got a new screen replaced but then i decided to get the whole phone done in red. So now i have a red iphone then a week later it just turned off all by itself. When I knew I had a lot of battery left. I tried everything nothing would turn on. I plugged it in the charger the apple showed up but then it shut right back down again. And if i take it off of the charger it won't do anything its like a broken phone now. Does anybody know what the solution is to this? Did this happen because It dropped and cracked or is it because they people took my phone apart and fixed it to get a new screen?

Try to reset it by holding both buttons at the same time…

Replace its i.c, i'm sure it will help.
it won't be like before but will make you relax and satisfied

  • My iPhone turned off by itself and turned back on while using a app? When I was on YouTube my phone just shutted off by itself then turned on. Is there something wrong with the phone. Also when I click my home button one time the phone sometimes wouldnt come on till the second click. What can I do?
  • My iPhone turned off and won't turn back on? I set my phone down while i was on the computer, didn't use it for like 15 minutes, and when i looked at it the screen was black and it shut off. It was on like 80% battery so it didn't die. I tried plugging it in to the charger to see if i could get it to turn back on but it will not turn on. I don't know what happened!
  • My iphone turned off and won't turn back on? - 1 My iphone does have a cracked screen, however it works fine. Anyways the battery % was at 14 and the my apps kept crashing just before it shut off. Now I've tried to home & lock button, plugging it in for a bit, it doesn't say it's dead but it still won't turn on.what's wrong?
  • My iPhone turned itself off and back on? An hour after I completely reset the phone, the phone screen went dark and then the Apple logo appeared again. So it seems that my phone just turned itself off and back on… But does anybody have any idea why? It hasn't happened since, though.