What is a GH040-02?
I don’t know what I have. The board says GH040-02 on it. It matches up to the diagrams for the GH040-12, and the model number is 75001. It’s a USA model. I’ve installed a recently purchased MI green dot. It wouldn’t boot initially. All I got was the Matrix screen at the beginning with no other action. I isolated the problem down to point I. If point I is connected on first power on, then the boot hangs at that Matrix screen. If point I is disconnected at first power on, then the usual Sony screen progresses and originals will boot, but backups say please insert a playstation disk. I’ve gone so far as to add an external switch to point I to verify this finding. With the switch off then on after boot, I can load PS2 DVD and CD based backups as well as DVD movies and PS1 backups. If I need to, I could modify the rear lid switch to make and break point I to allow booting, but I’m more interested in a correct fix. I do not beleive the chip is bad because I can get it to boot. BTW, it came with 1.91. I tried a downgrade to 1.75. Still the same. :banghead: Has anyone come across this kind of problem before?