Video Failure Troubleshooting
When we talk about troubleshooting video failures, we're usually talking about no image at all on the screen. The easy cases to diagnose are those where the monitor or LCD isn't powering up properly, or the PC not powering up. Video card failure isn't uncommon, and video cards can lose their contact with the motherboard, especially early AGP adapters which frequently popped out of their slot. Video failure can also be due to motherboard failure or to external interference, when it comes to poor image quality.
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