locked keyboard

Unknown operating system. keyboard LOCKED at startup. Unable to get into BIOS/CMOS setup. I need to know how to UNLOCK the keyboard. This info appears on the screen at startup:This is the info on the screen at bootup:

The CMOS checksum error has since disappeared.

Copyright 1990 Oak Technology VGA BIOS Dv2.17v-35

Base Memory: 640KB Extended Memory 3072KB

Cache Present Cache size:64K

03712KB OK

CMOS checksum failure
Keyboard is locked . . . . Unlock it

***RUN SETUP UTILITY***
Press key to resume

(C) 1987 AMI
Thanks!