I had to replace the CMos battery as It was defective. When I put in a new battery, the computer turns on, with two beeps but the screen is black, and I can't even enter the bios. It stays on for about a minute and shuts off.Somehow I've lost the bios. How can I clear the cmos on this motherboard, and what can I do to restore it. Can anyone tell me where the bios chip is on this model, because I can't seem to locate it. Is it an 8 pin chip? Would really appreciate any help. THank You.