Hi all, have a compaq 1210us laptop I'm working on and it won't boot, on the original batterie in it it has a button and 4 lights, marked 25,50,75,100, when i hold it in it blinks on 25, guessing either the batterie is dead or not charging, so after that I try from a power source with the batterie removed, it's a poping kind of sound from the speakers but no boot, anyone ever deal with something like this, curious before i go broke on alot of parts