"0251:system cmos checksum bad - Default configuration used"

[iCF-74 ToughMac]

Ok, it's evident my laptop would prefer to not wake...I return to it after setting it aside for a few hrs to find the power light on, but fans off , wifi card off etc but nothing at all will wake the LT. Once I power up I get an error : "0251:system cmos checksum bad - Default configuration used". I press F2, enter Phoenix BIOS and press F10 to save and exit without changing a thing. It boots nicely on it's own after that.

 

 

Any idea how this relates to sleep/wake/hibernation and how I can remedy it. I've seen posts online about this error from PC users who seem to feel it's primary cause it a dying CMOS battery.

 

 

Thanks,

 

 

Joe