3Replace the door in the back of the unit, and turn the knob clockwise to the locked position.
4Turn the HP OfficeJet off and then on again.
5Process your job again.
How to Use the Self-Test Page
The
To print a
1Press Menu until
2Press Select/Resume.
The test page has a set of lines that should appear unbroken, and colored bars that should appear solid. The intensity of the colors varies, depending on the type of paper you are using (that is, plain paper,
HP Premium Inkjet Paper, and so on).
HP OfficeJet R Series Customer Care Guide