When it blacks out, look very closely at the monitor and see if you can see a very faint image. If you can, the backlight is probably cutting out. That can be the inverter circuit that drives the backlight or the backlight itself.
The information on Computing.Net is the opinions of its users. Such
opinions may not be accurate and they are to be used at your own risk.
Computing.Net cannot verify the validity of the statements made on this
site. Computing.Net and Purch hereby disclaim all responsibility
and liability for the content of Computing.Net and its accuracy.