Parts are scarce for those units. Because the DP-45F has the complex servo arm, you would need to be experienced to replace the arm, which is a one piece unit and would probably cost an arm and a leg if -- big IF -- you can locate one. Rewiring the existing arm would be equally daunting.
Did you test it yourself? Maybe it's a problem with the interconnect, not the arm wiring.
Did you test it yourself? Maybe it's a problem with the interconnect, not the arm wiring.