Speaking generally?
Get a unit like this one ( there are several makers of them ):
http://www.newertech.com/products/usb2_adapt.php
Universal Drive Adapter
Pull your hard drive, hook up the adapter, and borrow a friend’s computer to find & copy your files.
Or, you could get another PC and connect the old HD as a slave or secondary drive, and poke around for your stuff.
Another idea would be to blow out the case ( to get rid of dust ) and try a replacement power supply.
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