CMOS password on a CompuAdd desktop

We have a CompuAdd desktop, Model A002, Type LP Where I work. It obviously is an old PC. Someone @ sometime has set a password on this PC. We cannot get beyond this, it will not let us into CMOS to change w/o typing the password 1st. Does anyoneknow how to reset the CMOS via the motherboard? There is no silk screening that indicates which jumper to pull or cross. Any help would be appreciated.