Monitor sudden turn of but PC still runs!

[SKREFI]

Random, my monitor shot down, (the green
led turn to red) and a messege apear "No Signla Input" but PC is still runing and I really hope it is not from the PC (I payed 1k Euros for it). Please help!

 

[ffg7]

do you have or can borrow a monitor compatible with your video card to see if that problem also appears on that monitor to see if it is a monitor or video card issue as I think it is your monitor?

 

[SKREFI]

do you have or can borrow a monitor compatible with your video card to see if that problem also appears on that monitor to see if it is a monitor or video card issue as I think it is your monitor?

Yeah, but is a littel bit difficult becaouse it hepen completely random.