i just installed a modbo 750 onto my v7 ps2 perfectly. no short circuits. i triple checked each point to make sure absolutely nothing was wired the wrong way. i just finished putting it back together and the ps2 works perfectly. it plays original ps2 games. but when i put in a backup, it goes to the red screen and says to put in the original ps2 or psx game. is there something i must do to "turn on" the chip? the diagramme from the modbo site did not show a point to connect the "cx" point on the chip...instead, the diagramme showed a point "z" that was not on the chip....could the cx not being soldered be the problem?? thanks..