HP 4500/4550

Printer HP 4500/4550 Printers:

1. Turn the printer off
2. Hold down the CANCEL JOB and SELECT keys and turn the printer on, then wait until the display goes blank and the three LED's come on
3. Press the right side of the MENU key, then press the SELECT key
4. You will enter SERVICE MODE after the normal test completes
5. Press the ITEM key until the FUSER MAINTENANCE COUNT appears
6. Press VALUE +/- to change to zero
7. Press SELECT to save
8. Press GO; the printer should return to READY