On my desktop a single beep means A-OK.
I doubt it's dead but we need more info; is this a branded (Dell, HP, etc.) unit or one you built? If branded do you have a recovery DVD, if you built it you should have your OS install disc.
In either case if you're running Windows and have your install/recovery disc, insert it and enter BIOS to change the boot order; if it's branded unit you'll have a one time boot menu option, usually F12. Change the boot order to DVD first and boot to the Repair option.
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