take the battery completely off the laptop then plug it in the mains , the laptop should come on , if it doesnt, 1 of the reasons is that your power supply isnt charing it , let me know how you get on
regards biffo
by doing what i said will eliminate a problem with the auctal power supply , if it works with power , only you know its the battery , if it doesnt , then ur power supply , try the simple solutions 1st mate