- HP LaserJet Service and Parts Manuals – TPS.online
- HP LaserJet 4000 Maintenance Kit Instructions - Precision Roller
- HP LaserJet 40 N Printers Getting Started Guide
- HP LaserJet 4000, LaserJet 4050 Service Repair Manual Download.
HP LaserJet Service and Parts Manuals – TPS.online
If the display panel on your HP Laser Jet reads "perform printer maintenance", "perform user maintenance", or anything along those lines it means your printer needs a preventative maintenance kit. If the short cut method doesn't reset the maintenance count then you will need to go into service mode and manually reset the maintenance count.
HP LaserJet 4000 Maintenance Kit Instructions - Precision Roller
Once you have installed the maintenance kit the message will only go away if you reset the maintenance count. Once the maintenance count has been reset the "Perform Printer Maintenance" message won't appear again until the maintenance interval has been reached (200,000 pages on a Laser Jet 4000).
HP LaserJet 40 N Printers Getting Started Guide
Simultaneously hold down the minus side of the Item key, and the minus side of the Value key. This is due to many different formatter board revisions.
HP LaserJet 4000, LaserJet 4050 Service Repair Manual Download.
NOTE: Some version of the Laser Jet 4000 will not have their maintenance count reset by following the preceding "short cut" method.
Service manual for hp laserjet 4050:
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