If you have spare parts to play with, try to do the following.
1. Try to set everything in the BIOS to default to eliminate overclocking problem.
2. Use a different monitor see if it still happens or try to use a different input cable assuming your monitor have other ports such as VGA, HDMI, DVI... etc. If you don't have a different monitor, maybe you can your TV. If it still happen, then do the following.
3. Swap out a different power supply to see if the power...