My PC's Monitor Suddenly goes blank when in use

ryokun

Reputable
Sep 4, 2015
8
0
4,510
i have a problem on my pc, so when i using it ( usually for gaming such as pubg and overwatch ) my monitor goes blank and it display no signal but i still can hear the ingame sound, but when i try to turn my monitor back on, it wont turn on until i restart my computer.
After the restart everything goes normal, but when i use it for gaming, sometimes it happens again,its not always happens, but it kinda annoying 🙁 it happens almost at all my games.

maybe the problem is the psu or the monitor or the cable but im not sure :/

My specs :
intel i5-4670 3,4GHz
Nvidia GTX 970
RAM Patriot 16GB
PSU Super Flower Golden Green Hx gold 80+ 550w
LG 24gm77

oh and i never overclock any of my hardware
thanks before :)