Am having a P4 system of 1.4Ghz speed. The problem is that my PS2 keyboard is not detected in this system. When I reboots the system the keyboard lights will blink but later it is not working on this system. I had checked this keayboard in my friends system and its working finely. So what might be the problem???
Try another known-to-be-working ps/2 keyboard with the system.
If that doesn't work, then try a known-to-be-working USB keyboard with the system.