Lexmark T620 Service Manual - Page 101

4069-5XX/7XX The base printer indicates a dead machine condition when the high capacity input tray is installed. FRU 1 AC Line Cord AC Jumper (HCIT to Printer) AC input and Output Receptacles AC Wiring Harness Action If the base printer works normally using the AC line cord from the AC wall outlet and does not work when using the AC jumper from the HCIT, check the AC jumper cord. If defective, replace the cord. If not defective, check the AC input and output receptacles and wiring harness in the HCIT. Repair or replace the receptacles or AC wiring harness as required. NOTE: Make sure the ground wire is installed correctly from the AC wiring harness to the frame of the HCIT and the nut and lock washer are tightened. Diagnostic Information 2-73