Hi all, I'm upgrading my Happ supers to Happ Perfect 360's and I've come across a wiring problem. When I only have the joystick for P1 wired up the cabinet plays fine (but with only one player). Then when I connect up the 5v/ground terminals to the P2 joystick the P1 joystick is always stuck in one direction. if i disconnect that direction wire then it will get stuck in anotehr direction, so basically when I connection P2 joystick all directions of P1 are always on.
The 5v to the Happ 360's are taken from a pc molex connector. Ground is also taken from the molex but I've also tried with taking it from the cabinet using a spare ground line off the buttons, no difference.
Could someone who understands jamma wiring explain what I'm doing wrong here.
Thanks guys!
Adrian
ps. Think this is one of my first real posts

My cabinet is a Metal Magnum, its a fully metal cabinet with a 26" monitor. Bloody heavy but solid when playing those fighting games.