Laptop Fan Runs Constantly/a/c power supp hot

[janetvans2001]

I have a HP OmniBook 600 (old huh?) and the fan seems to run constantly.  At the same time I notice that the a/c power supply gets alarmingly hot.  I just replaced the battery because it recently died, but I noticed the fan running prior to replacement of the battery.   My question is this: what could be causing this?  Dirty innards...HD going bad...or needs new fan?  Would appreciate some help.  Thanks

[GX1_Man]

If you can get to the fan and see if it is dirty that would be good, but some of those HP's just run the fan at max all the time. What processor is in there? Are you the original owner?

[Fed]

Make sure you use it on a solid surface where there is no chance of any vents being blocked.