How can I repair a video card?

My monitor is saying 'check signal cable' but the monitor is fine. I heard it could be the video card, how can I repair it?|||It could be, but that doesn't mean it is. You don't "repair" a video card unless you consider the last-ditch of baking it in the oven to be "repair". You replace.|||remove ur vedio card and wash it brush it and then try|||Try different display cable, see if it work|||Does your monitor have more than one input? Check that it's set to the one your video card is plugged into...