Computer going to sleep mode , Help !

[Dovydas_3]

So hello . My computer was working loud , so i changed thermopaste and then started my problems . Pc goes sleep during gaming , looking films , and siting in internet . Sometimes he goes sleep 3 times in 5 min. sometimes 1 time in 1 hour. Coolers working fine . Temperature good . Sleeping options to is good. Where can be problem in ? And i forgot to tell he goes to sleep sometimes when i move pc, when i push the button , or self when i waching the movie . And the last problem sometimes when i shutdown pc , i cant to turn on.

 

[Dovydas_3]

One more question computer was working good , but i shut down and now i cant turn on , with ac adapter batterie light is on , but i cant turn on why ? My laptop acer v5-573g

 

[Dovydas_3]

I think i having black screen i try to boot bios from usb , but didint helped. What should i do ?