Look at system properties to see what xp is using for power management. See if it is enabled. Many laptops are rather odd. They might require special tweaks that the manufacturer did on the previous OS to get it to work.
found while re-searching your problem: remember to always back up your registry before doing ANY changes to it.
I would also wait for someone who's been around here awhile to add to or change this advise.
Esp. if you've never worked with your registry before.
Mark in Redondo Beach - recreating default power schemes in XP
After doing some research Iíve determined that there is no standard default power scheme, since OEMís often customize these. However, Kellyís Korner XP (a fabulous Windows XP tweak resource) has a generic set you can download from here as a Registry file. Download the file and double click it to install the power schemes in XP. You may want to tweak these a little in the Power Options control panel after you install them.
Edited by diana1096, 24 July 2006 - 06:55 AM.