Thanks for posting back. I have seen this problem many times and it has almost always been the video cable coming loose at the motherboard, or just a bad cable. On a few occasions it was the onboard video going bad causing the motherboard to be replaced. I have even seen where an external monitor worked just fine, but the LCD has this problem and only a motherboard replacment fixed it.
Originally Posted by SSchoeppey
Good to know there is another cause.
Although when it comes down to it, wiping the drive on a customers machine is usually a last resort option and usually the responsibility of the customer. So that usually means exhausting all hardware issues first leaving only a corrupted windows install as the possible culprit.
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