Yesterday my computer froze completely with no bsod how to find out why please help

Yusuf Il

Honorable
Aug 16, 2014
324
0
10,790
And only a hard shut down with the power button work even Ctrl alt delete did not worked the screen freezes at the latest image I have i76700k with gigabyte z170x gaming 5 latest f5 bios windows 10 64 bit I can't find anything in event viewer at the time the freeze happened it did that for the first time my motherboard debug code stayed at a0 did not gave any error code during the freeze Also why the freeze happened I was not gaming only I was on the desktop with steam program opened looking for new games I have seasonic g650 and sapphire r9 390 nitr as I said I did not got any error on the debug screen during the freez