Ink Cartridge Refill Help Center

HP 901 Extended Self Test

To verify HP OfficeJet J4500, J4600 and 4500 general printer and ink cartridge print quality performance conduct an extended self test (‘Tap 41’):

1) Press the ‘Cancel’ and ‘OK’ buttons at the same time and release. The diagnostic pattern will print.

2) Evaluate color stair-step patterns.



Advanced Diagnostics

To view advanced diagnostics tests for your printer, click here:

HP Printer Diagnostics


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