don't listen to that caveoftreasures guy he is just a trouble maker    

all jokes aside he does own one of these machines and is more than likely right, and he is a good friend of mine.

another thing you can do is go into the diagnostics and do a switch test, roll the ball over the relevant switches a few times and make sure they work every time.

if you don't have the latest roms (version 2.2) let me know and I can organise them for you.

By the way,   to the forum