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Possible Video or graphics problem

Hello all,
Hopefully someone on here can give me a hand with this. I've got a Gateway 420gr desktop, that I have rebuilt because in blew up about a year ago. I put in a new motherboard and hard drive and every thing is working fine so far. Except this, every now and again I get a surge in my monitor that looks like...i guess you could say a short, but it doesn't last long at all. A second if that, but it does 2 or 3 times and it's done for a while. But it does do it over and over. I am wondeing what the cause of this is. I have checked my settings and everything seems ok. Could this be a driver problem? or is it the monitor? Could it be the video or graphics card?
Any and all help would be greatly appreciated.
Thank you,

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How old? What model?

In reply to: Possible Video or graphics problem

Sadly it sounds like the video display and not the card. Try another one.

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Monitor issue

In reply to: Possible Video or graphics problem

Is it a CRT or LCD monitor?? My guess would be IF CRT, focus bleeder or flyback xfrmr, time to get rid of it. If LCD, something awry w/power input, could be inverter or something going down on the main board but as Bob said more than likely a monitor issue, unlikely vid card.

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