well it could be either the graphics card failing or power supply not giving enough juice (but I would think that'd cause crashes, or monitor failure.
in terms of software: if it only happens in the one program then the solution is obvious: stop using that program, or update it.
if it happens no matter the program, but has to stress the video card to do it, I'd look in terms of hardware/driver issues
if it happens no matter the program, it could be again, drivers, or operating system, or the monitors.
just a basic run down of the kind of way you have to go about figuring the shit out
hope it helps.
Posted on Thursday, 17th March 2011