Red/Blue patterned dots on PC screen?

Out of nowhere my brother brings a problem up to me about his PC. Apparently there are red/blue patterned "dots" throughout his monitor. It's an LCD monitor and I know it's not "dead" pixels because when he boots up sometimes their there and other times they aren't. I really... show more Out of nowhere my brother brings a problem up to me about his PC. Apparently there are red/blue patterned "dots" throughout his monitor. It's an LCD monitor and I know it's not "dead" pixels because when he boots up sometimes their there and other times they aren't. I really don't understand the problem but I do know he can't log into pc games without it freezing up now. He has formatted and reinstalled drivers. Any ideas? If any of you could be of help it would be very much appreciated. (They start on the "DELL" logo and even proceed through the bios setup screen.
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