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Check your Motherboard for bad capacitors. Check out www.badcaps.net for details. Swap power supply. (Another Capacitor issue) Video card could be dying, but not likely. Remove any modems you may have, (Lightning or other surge from phoneline fried the modem and it is hanging the system) Exorcism (Kidding)

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Q: When you switch on the computer a message comes on the monitor 'No signal input' and hangs for 10-20 minutes before it starts booting what is wrong?
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