HP LaserJet M630 Enterprise MFP

The basic product functions should start up when the product is connected into an electrical outlet and the power switch is pushed to the on position. If the product does not start, use the information in this section to isolate and solve the problem. If the control panel display remains blank, random patterns display, or asterisks remain on the control panel display, perform power-on checks to find the cause of the problem.

Power-on troubleshooting overview

During normal operation, a cooling fan begins to spin briefly after the product power is turned on. Place a hand over the vents in the rear cover, near the formatter. When the fan is correctly operating, air passing out of the product is felt. Lean close to the product to hear the fan operating. If the fan is operating, the dc side of the power supply is functioning.

After the fan is operating, the main motor turns on (unless the top cover is open, a jam condition is sensed, or the paper-path sensors are damaged). Visually and audibly determine that the main motor is turned on.

If the fan and main motor are operating correctly, the next troubleshooting step is to isolate print engine, formatter, and control panel problems. Perform an engine test. If the formatter is damaged, it might interfere with the engine test. If the engine-test page does not print, try removing the formatter, and then performing the engine test again. If the engine test is then successful, the problem is almost certainly with the formatter, the control panel, or the cable that connects them.

Troubleshooting power on problems

1. Verify that power is available to the product. If the product is plugged into a surge protector or uniterruptible power supply (UPS), remove it, and then plug the product directly into a known operating wall receptacle (make sure that the wall receptacle provides the correct voltage and current for the product). Unplug any other devices on the same circuit that the product is using.
2. Try another known operating wall receptacle and a different power cord.
3. Listen for startup noises (fans and motors) and illuminated lights on the control panel.
   NOTE: Operational fans, motors, and control-panel lights indicate the following:
   • AC power is present at the product.
   • The low-voltage power supply (LVPS) is providing either or both 24 Vdc and 5 Vdc voltages.
   • The DC controller microprocessor is functioning.
4. If startup noises are not heard, check the following:
   a. Turn the product off, and then remove the formatter.
   b. Turn the product on, and then listen for startup noises. If normal startup noises are heard, go to step 5.
   NOTE: The control panel will be blank with the formatter removed.
   c. Turn the product off, and then remove any installed accessories (for example, envelope feeders, paper feeders, or output accessories). Turn the product on, and then listen for startup noises. If normal startup noises are heard, the problem might be with one of the accessories.
   d. If normal startup noises and lights are still not present, replace the LVPS.
   e. If after replacing the LVPS normal startup noises are still not heard, replace the DC controller.
   f. If after replacing the DC controller normal startup noises are still not heard, replace the HVPS.
   NOTE: If the error persists after replacing these assemblies, escalate the problem to the Global Business Unit (GBU).
5. Try printing an engine test page.
   a. Use a small pointed object to depress the test-page switch located on the rear of the product.
   NOTE: The test page can only use Tray 2 as the paper source, so make sure that paper is loaded in Tray 2.
   b. If the engine test page prints, the print engine is operating normally (a failed engine test print page does not necessarily indicate that the print engine or DC controller is defective).
   NOTE: If the engine test page does not print, turn the product off, remove the formatter, and then try the engine test again. If the page prints, the problem might be the formatter.