Monitor rebooting randomly on ASUS motherboard

[JayHan99]

Yesterday I bought an ASUS desktop with an Acer monitor. I've plugged everything in correctly and everything worked fine yesterday. But today, I'm just trying to download video games or when I try to play them, my monitor just reboots itself by saying "no signal". My asus motherboard's on/off button stays on so i think it's the monitor that's acting up weird. But when I tried another monitor, the same thing happens. Why is this happening? It was fine yesterday... I'm very frustrated so please help me1

 

[cin19]

But today, I'm just trying to download video games or when I try to play them, my monitor just reboots itself by saying "no signal".

Where do you download it from? Maybe you get the something extra you don't want, like virus, malware.
Or can you use the PC now?
Try take out or disconnect the hard driver to see the PC can boot or not, keep in mid if the pc can boot you will get the error message-no OS.