I've just installed a Comsoft v4 fix into my PAL v12 PS2 (motherboard model is GH-035-41, and laser is PVR-802W).
With the Comsoft fix installed, my PS2 won't turn on. There is no power light or anything. If i disconnect 5V wire on the comsoft chip, the PS2 then seems to work fine.
I've followed the installation diagram very closely, and I'm sure that I've installed it correctly. Has this happened to anyone else before, and do you know how to correct it?