Sounds like the BIOS is Dead. I would junk the system. That system really is not worth fixing. The thing about DELL is the componets they use are not the best. I have owned a few DELL products in the past the Desktops by DELL have never made it to 3 years without dying. The Laptops I've had have been good. I have one that is 8 years old and it still works great.