Then it's usually mainboard, LCD and/or wiring between these. These models are often found off lease for cheap like
http://www.tigerdirect.com/applications/searchtools/item-details.asp?EdpNo=8686412&SRCCODE=WEBGOOPA&scid=scplp737681&gclid=CjwKEAjwhdOwBRDFsYTfhvzX1hYSJAAfCUcLo_iQ6USumTZ-P7s4iIoXXFkVjzkE-pv6R-pD8uDJvRoCq97w_wcB
I'd get a working model and swap your HDD into it. Frankly I'd call it and move on to a new laptop.
Got warning last week about problem with video hardware. Today, screen suddenly has double over/under image. Rebooting does not help. Computer is dell d-630.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic