My ps2 keyboard works fine until I try to boot from a CD running MaxBlast5. The keyboard seems to quit responding at the point where BIOS displays the message "Boot for CD:" I can enter BIOS and select the Boot Menu from the keyboard prior to that, but then it quits. I have tried two working keyboards with same result. I think it may work when I plug in a USB keyboard, but am not certain yet. This is an Alienware motherboard with NVIDIA bios. If I boot Windows 7, the keyboards all work fine. Perhaps I changed something in BIOS or maybe the motherboard has a problem?