Bad wiring connection

Check connector J901 on the LCB and the LDM, slot 6. Make sure the cable is properly seated. If problem persists, replace the cable.

Defective +36V module LDM

Replace the +36V module in the LDM (LDM slot 6). See service procedure "Replacing a Laser Drive Module".

Malfunction LCB.

Replace the Laser Control Board (LCB). See service procedure "Replacing the Laser Control Board (LCB)".