Horizontal lines on monitor,pc shut down,random restarts...

Mar 24, 2018
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Hi to the community,i have a big issue with my pc.
last 2 months i have lines on my monitor, i checked all cables, replaced them. Still the same.
i checked graph card, its fine.
Pc restarting during the games.
When i shut it down from start shutdown, he just turn on by himself.
I did next... i moved my pc to other house, and it worked perfectly. No lines no restarts, nothing. Just perfect...
I also checked voltage in my house, its good.
Anyone had this issue???