HP LaserJet 5000n page, Action, Roller, Cartridge, laser beam, the printer, Laser/Scanner, continuously), Possible Cause, defective (not, Defective Toner, supply circuit is

Table 7-10. Black Page (continued)

Possible Cause	Action
Defective Toner	Replace the Toner Cartridge.
Cartridge.
Light is leaking into	Ensure all covers are in place.
the printer.
High voltage power	Replace the High Voltage Power Supply PCA.
supply circuit is
defective (not
supplying the correct
negative voltage).

The High Voltage Power Supply is installed improperly. If the High Voltage Power Supply has been removed and replaced, it may not be seated properly.

Remove the DC Controller Board and check the connectors for damage. Reseat the DC Controller Board, being certain to fully seat the connectors.

Bad Primary Charging	Replace the Toner Cartridge.
Roller.
DC Controller PCA is	Replace the DC Controller PCA.
defective. If the DC
Controller turns on the
laser beam
continuously, the
entire surface of the
Photosensitive drum
is neutralized causing
a completely black
page.
Laser/Scanner	Replace Laser/Scanner Assembly.
Assembly is faulty
(turning laser on
continuously).

7-52Troubleshooting EN