I have a Dell Dimension 9150 that only has USB ports (no PS2) and for no particular reason, the keyboard drop dead. I have checked both the mouse and keyboard on another computer and they work perfectly and I have tried others that I know to work and they won't work either. The Pheonix Bios gets almost to the end and then says "keyboard failure", and asks me to press F1 or F2 (now that is pretty screwed up). I can't press anything. I have followed other advice and reset the bios, drained the system of power, removed the lithium battery, checked the physical ports etc etc etc. At the moment, the only answer is to buy a new computer - not happy. The computer is only 18 months out of warranty. HELP!!!