Authorized Hewlett Packard Partner
Authorized Warranty Delivery Partner
Hewlett Packard Certified Technicians

For on-site repair

Toll free: 877-861-2413

Basic Troubleshooting Procedures

Before troubleshooting a specific printer problem, you should ensure that:

• The printer is being maintained on a regular basis.

• You are using acceptable print media as specified in the HP LaserJet Printer Family Print Media Guide.

• The printer is positioned on a solid, level surface.

• The line voltage does not vary more than 10 percent from the nominal rated value as specified on the power rating label.

• The operating environment for the printer and paper is within the temperature and humidity specifications.

• The printer is never exposed to ammonia fumes such as those produced by diazo copiers or office cleaning materials.

• The printer is not exposed to direct sunlight.

• Non-HP components (such as refilled toner cartridges, EIO accessories, and DIMMS) are removed from the printer.

Note When moving the printer into a warm room from a cold location such as a warehouse, various problems can occur as a result of condensation in the printer. Additionally, if the photosensitive drum is cold, the resistance of the photoconductive layer will be high. This will lead to incorrect contrast. Leave the printer running for 10 to 20 minutes before its first job.

Laserjet 4000

LaserJet 4000 T

LaserJet 4000 N

LaserJet 4000 TN

LaserJet 4050

LaserJet 4050 T

LaserJet 4050 N

LaserJet 4050 TN

LaserJet 4100

HP LaserJet 4100TN

HP LaserJet 4100N

HP LaserJet 4100DTN