I've modded my PS2 (v9) with the above chip. At first it worked 100%, then
after playing for a few hours it would not boot up on a reset. If I left it
for a hour then tried again it worked. Not it doesnt boot up at all.

I've removed the mod and all wires but it still doesnt boot.

The screen is just blank. The reset/eject lights come on, and I can hear the
dvd drive spina and the head moves.

I've double checked for solder splashes and all the fuses are working.

Any ideas?