Updated: May 8, 2019
How to navigate the HP M604 M605 M606 Printer component test menus.

Use the procedure below to test various printer mechanical and electromechanical assemblies.
Individual component diagnostics (special-mode test)
NOTE: The following table describes the sensor tests available with an optional 1x500-sheet paper feeder, optional 1x1500-sheet high capacity input (HCI) feeder, and an optional 500-sheet stapler/stacker installed.
For trays other than Tray 1 or Tray 2, the tray number associated with a sensor or switch depends on the number and type of accessories installed.
This test activates individual parts independently to isolate problems.
Each HP M604 M605 M606 Printer component test can be performed once or repeatedly. If the Repeat option is enabled from the drop- down menu, the test cycles the component on and of. This process continues for two minutes, and then the test terminates.
NOTE: The front or side door interlocks must be defeated to run the component tests. Some tests might require that the ITB and toner cartridges be removed. A control-panel display prompt appears indicate removing some, or all of the cartridges, during certain tests.
HP M604 M605 M606 Printer Access the individual component diagnostics from a touchscreen control panel
1. From the Home screen on the printer control panel, scroll to and touch the Administration button.
2. Open the following menus:
Troubleshooting
Diagnostic Tests
Component Test
3. Select the component test options for the test.
HP M604 M605 M606 Printer Access the individual component diagnostics from a LCD control panel
From the Home screen on the printer control panel, use the down arrow button to scroll to Administration, and then press the OK button.
Use the down arrow button to scroll to Troubleshooting, and then press the OK button.
Use the down arrow button to scroll to Diagnostic Test, and then press the OK button.
Use the down arrow button to scroll to Component Test, and then press the OK button.
NOTE: The following table describes the sensor tests available with an optional 1x500-sheet paper feeder,optional 1x1500-sheet high capacity input (HCI) feeder, and an optional 500-sheet stapler/stacker installed.
For trays other than Tray 1 or Tray 2, the tray number associated with a sensor or switch depends on the number and type of accessories installed.
HP M604 M605 M606 Component test details
Component test:
Item tested:
Replacement part number:
Comments:
HP M604 M605 M606 Printer Drum motor
M102
RM1-8358-000CN Drum motor assembly
Activates the specified motor.
HP M604 M605 M606 Printer motor
M299
RM1-8928-000CN Fuser motor assembly
Activates the specified motor.
HP M604 M605 M606 Printer Pickup motor
M101
RM1-8285–000CN Paper feed motor assembly
Activates the speciied motor.
HP M604 M605 M606 Printer Switchback motor
1501
RK2-2139-000CN DC motor
Activates the speciied motor.
HP M604 M605 M606 Printer Duplex refeed motor
1501