Cracking Open the Compaq Presario V2000 Laptop

I'm trying to locate the "voltage regulator". I'm having power issues and have narrowed down the possibilities to a couple this but the voltage regulator is my prime suspect. Once I can locate it, I can use a volt-o-meter to determine if it is in fact in need of replacement. Any idea how many volts are suppose to be running through it? Any idea if this part is even replaceable?? Any help is much appreciated.

Thank U Thank U Finally worked out how to remove casing after undoing screws. 4 Niggly bits on batery needed popping from back of the casing.

Very enlightening photo gallery and explanations. This gives me more courage to repair my own laptop, I previously stuck to repairing only my PCs.
Thank you very much for taking the time out to post this info.