Earlier today, I had it open while I was inspecting the power connector, which is slightly corroded. When I put it all back toghether, and powered it on, I was greeted by a loud "scrunch" like noise from the speaker, and a momentary flicker of the screen. Then it turned off.
I opened it back up, made sure everything was connected ok, then hooked it all toghether. Now, every time I boot it up, I see an image just like this - http://john8520.pweb.info/180screen.png
I hear no noise of the HDD or FDD spinning up, and nothing from the speaker. Did I really manage to totally kill it?