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324 Troubleshooting Q2431-90912
Table 74. Dark print
Possible cause Recommended action(s)
Wrong toner density setting. ● Access the print-quality menu at the control panel, and adjust
the toner density setting. See “Print Quality submenu” on
page 46.
The print cartridge drum is close to the
end of its expected life.
● Replace the print cartridge.
The media does not meet specifications
or is not stored properly.
1. Turn over the stack of media in the tray. Also try rotating the
media 180 degrees.
2. Check the media for type and quality. Replace the media,
and advise the customer to use the HP recommended
media and to store it correctly. See “Paper specifications” on
page 9
Poor high-voltage contact to the power
supply.
● Clean the contacts if they are dirty. If the problem persists after
cleaning, or the contacts are damaged or deformed, replace
them.
Defective laser/scanner assembly.
● Replace the laser/scanner assembly. See “Laser/scanner
assembly” on page 173.
Defective high-voltage circuit.
● Replace the power supply. See “Power supply” on page 188