[Headly]

Are you talking about the pads that are connected to the bios? If so you should solder wires Q,T,U,V, and R to these pads. Did you look at the backside of the board? Check the wires for the CD\DVD controller. I suspect that if one of the wires related to DVDs came off it could affect your PS2 booting, could be wrong hopefully Dust will have more info. Try a PS2 CD based backup and see what happens.