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As you know CMOS is an on-board semiconductor chip (stores BIOS) powered by the CMOS battery you refer to, inside computers that stores information such as the system time and system settings for your computer.
I have heard of issues when the CMOS battery is low (1.3 it should have failed normally by now), from boot inc other issues, so id say yes possible.
The thing is any machine at POST boot is only as powerful and reliant as its Bios, which has given me another thought. Some companies when a system boots have the CMOS ROM copied to RAM as ram is faster, I cant honestly say if HP do this, was just a thought.
hope helps a little, let me know if i can be of further help
VGA card problem..that's what tech told me & changed it 3 times...but still laptop goes off.(exactly like u described)...they finally said need new motherboard??? so VGA will not do this again!!!!
I don't know, If I change motherboard...will this happen again...is it worth it??? My pavillion dv 2000 is only 1.5 years old..was expensive??/
You could be expierencing a problem with your monitor screen. try this.... connect another monitor screen to the VGA port of your laptop. Now try booting up. Look for and push Fn + the key that turns on a secondary display. if the monitor screen comes on. you need
another laptop monitor. At least you can use your laptop with the second monitor for now.
remove battery,ac adapter and other external medias,then hold on power button for 30seconds
with ac adapter attached try to power on still probs ...then its bios probs need to use bootable disk or recovery disk of your laptop