On Sat, 17 Nov 2012 09:06:34 -0600, Karl Townsend
wrote:

On 17 Nov 2012 05:22:24 GMT, "DoN. Nichols"
wrote:

On 2012-11-16, Karl Townsend wrote:
i had a CMOS checksum error on my CNC mill. So, I installed a new
motherboard battery. Now the CPU fan just comes on and it makes no
attempt to boot. Is the computer DOA? I checked connections and
wiggled stuff.

You may need to reset the CMOS. Pull the new battery, and short
the pins of the holder for a few seconds, then re-install the battery.
You will probably have to reset all the options after this, of course.

Good Luck,
DoN.

JOY, This was it but shorting it didn't work. leaving the battery out
all night did.

Karl

Lucky!!!.
Back when the RTC was a separate chip we would remove the battery and
put a peice of tinfoil over the clock chip to short out all the pins.
The clock chip contained the C-MOS in most of those older machines .