Samsung Galaxy A3 turns itself off and won't turn back on

[AC Question]

I have had this phone for less than a year it has been fine up until about November 2016. My phone just turn itself off and i cannot get it back on without pressing all of the buttons to switch it on loads of times sometimes it comes back on, on the first try other times it won't turn back on for a day. It occasionally puts itself on the reset screen without me touching it also. It turning off is completely random i can not use it all night and it will still switch itself off or I can be using it and the screen will suddenly be black and it won't turn back on. Please help i have no idea how to stop this I can't take the battery out, it only randomly brings up the reset page and i have no conclusion as to why, when it does turn on why it does so.

 

[belodion]

A diagnosis via a forum is difficult alas so it may be best to consider using your warranty.