i have one of these laptops and it's in fairly good condition other than an issue with the power supply/AC adapter that prevents it from functioning now. a few months back, it would work, but you would have to jiggle the power cord in the back of the laptop to get it to charge. finally it quit working altogether and won't power up. the batteries are already in bad shape, barely holding a charge, but now nothing works as a result of this problem. does anyone know what the problem is or how i could determine if this is a problem with the power supply or the AC adapter/power cord? i dont' have any other power cords/adapters that would work with it, unfortunately. alternatively, how much would a problem like this cost to fix? say there's an issue with the internal power supply. how much would sony charge to fix it?