Aspire 1640z motherboard problem

hi there every one, your help is much appreciated...

i have an acer aspire 1642nlci laptop for about over 2 years now... recently the battery (simplo 4-cell) went nuts, and i disassembled it to see if i could do something about it ( the issue was, whenever i'd boot up my operating system i.e XP, the system would stuck, until i remove and then replug the battery in to the laptop)... well i did no repairing, just put the cells out and then back to the casing, inserted the battery into the lappy, and the issue went all by itself... however, 2,3 days later, the battery stopped charging and agonized by the situation already, and while i had my battery(without the casing) inserted into the laptop, i shorted the i/o pins of the battery to each others with a metal... and then the real issue began... my laptop is cursed, it won't start anymore past the initial 'acer' screen... sometimes the lcd won't light up even... pressing f2 helps nothing, keyboard doesn't work... and if you let it stay on for a while, the power indicator leds *both the supply and battery status ones* start to go dim and dimmer... i think i have fried the mother board's power supply area...

guys,,, i feel real trash for doing what i did,,, i have no idea what could be done to repair and undo the curse on my system... please advise...

thankyou !