When I press the power button, absolutely nothing happens. No lights, no sounds, no display. The adaptor lights up, but once I plug it into the laptop, it goes out. I've tried removing and re-inserting the battery, which should be charged up, but nothing happens. Does anyone know if this could be a hardware or power supply problem or something else? My warranty has expired, but I'd rather not have to take it to a repair shop. Any help would be very much appreciated!

Have a look here: Tutorial: No POST (Power On System Test)

Here is another tutorial: Tutorial: NO POST / Power General troublshooting

ah - this is probably more appropriate:

http://www.techspot.com/vb/topic55208.html

Not trying to cause grief
But that link is in the No Post Tutorial as well "(on laptops)"

I don't want to post 3 now