another issue to report lucky me!
i came across a v12 ps2 which a strange problem to which i can't seem to find an answer on the net.
if there is no disc in the ps2, the ps2 boots up normally. Once you put in a game it switches itself off. i opened the case and pressed both switches to see what is going on.
the laser come on and tries to detect the disc if there is none. there doesn't seem to be any melting points on the lens and it's still clear. however, when i attach a dvd and hold down both switches, the disc spins a quarter of the way round 3 times and the ps2 switches itself off.