Well, unfortunatly, my power board/PSU is broken and I need a new one. My PS2 wouldn't turn on one day, and I realized it was the power board and not the main board when I: 1)Switched my power board with my friend's and saw that my PS2 then worked. and 2) Switched my fuse (the one next to the main power switch plug/outlet) with my friend's, and saw that my friend's fuse instantly blew. So now my question is...which PS2 versions have power boards that are compatible with my PS2 V4??