Can anyone recommend where I can buy a replacement ac adaptor for my laptop? The original one has become dodgy, having to fiddle around with it where it plugs into laptop to get it to work. Have seen loads on ebay but not sure if I can trust them (don't want to damage the laptop). Also don't want to spend loads. It has a 2 pin connection into the adaptor from wall socket (many on ebay say you need a 3 pin). Any help gratefully received thanks.