Computer freezing abnormally

[Karan SHah]

My PC turns on properly without any errors but after some period a white or pink screen starts blinking on monitor and after some time monitor's power led starts blinking. And doesn't manual restart immediately. But after waiting for 5-10 min it again starts normally but again after starting in some time same problem occurs.

 

[Tmagic650]

What type of monitor is this?