I need help.Recently I put together a comp. for my youngest.It just bit the bullet.It wont fire up,that is to say it starts , it beeps, but i get error message---cmos default error-defaults loaded.It no longer sees the keyboard.The keyboard no longer lights up when it beeps.I have tried pulling the battery out.I have also tried setting temporaryjumper,then remove-nothing.If i could get it to see the keyboard i could do something.the motherboard is a gigabyte 7VM400m-RZ....w/ a sempron 2800.ant ideas would be appreciated.