I have a dell 466 and it keepsgiving me a error message stating to enter time anddate  and the time anddate wasalready entered several times by me.  Is there a configuration pin somewher on the board  or abattery i ca n take out or replace   Again i havent seen one   i see something where there are  2 pins coming up and it says cmos after it but there is no jumper pin on it   again where isthe battery.  Does anybody knowthismachine or what to do