My test for a bad CMOS battery is simply to load the default CMOS values - make sure the machine is NOT turned off - and see if the problem goes away - but returns after the machine is turned off (for a time).
HP suggests several things to look at (Joe's suggestion included): http://h10025.www1.hp.com/ewfrf/wc/document?docname=bph03560&cc=us&dlc=en&lc=en
Some suggest using a meter (watch that it's impedance is very high and that your fingers do not make you part of the circuit - very very low current draw capabilities in these things): http://smallbusiness.chron.com/check-battery-level-bios-47576.html
But frankly if you are going to go to all that trouble - for the cost (see: http://www.amazon.com/Energizer-CR2032-Lithium-Battery-packs/dp/B00FO9HQLS/ ) you might as well keep some on hand and replace them while you are in there.
On Sun, Aug 31, 2014 at 10:07 PM, Joe Zeff <joe@xxxxxxx> wrote:
On 08/31/2014 09:56 PM, Tod Merley wrote:
cmos battery
That's an easy one to check for, especially on a laptop that's not on 24/7: go into your CMOS settings after it's been turned off for several hours (overnight should be ample) and see if the clock's running slow. Computers have been built to do that when the battery's running low for decades as a warning.
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