hi all....
my laptop has a

strange problem. one day while working on battery i left it went away for some work. the charge remaining was 40%. when i came back after 15 min. my laptop was switched off. from then onwards my battery is not getting charged. when i work using AC it works but it does not show any charging, on battery it is not getting switch on.
i tried replacing the battery, but i got no change in it

. it is not getting charged. if we put a charged battery it works fine. but when battery gets down it is not getting charged with AC powered down.
My laptop is HP COMPAQ-Presario M2002; with intel celeron processor 256 Mb ram; Windows Xp-SP2 OS; want to know what may be the problem.
note: i tried opening it, i found now components worn out or burnt, the board looks fine. please suggest.
regards---minnathullah