I recently got a hand me down graphics card and power supply, and ever since then my monitor would go black, say "no signal" and never come back on until I manually turn off the computer. Sometimes this will occur after 30 minutes after I boot up, sometimes 3 hours, sometimes never.
Any help with this would be much appreciated
[Edited on 12.08.2012 2:13 PM PST]
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Really? The cable is damaged.