cartridge available to avoid possible printing delays. You do not need to replace the print cartridges until print quality becomes unacceptable.

If you have installed a refilled or remanufactured cartridge, or a cartridge that has been used in another product, the ink level indicator may be inaccurate or unavailable.

For HP product return and recycling information, visit us at: www.hp.com/recycle.

Cause: The indicated print cartridges were estimated to be low on ink and might need to be replaced soon.

Printing in ink-backup mode

Solution: If you receive the ink-backup mode message and two print cartridges are installed in the product, verify that the protective piece of plastic tape has been removed from each print cartridge. When plastic tape covers the print cartridge contacts, the product cannot detect that the print cartridge is installed.

1Copper-colored contacts

2Plastic tape with pink pull tab (must be removed before installing)

3Ink nozzles under tape

Troubleshooting

For more information, see Use ink-backup mode.

Cause: When the product detected that only one print cartridge is installed, ink- backup mode is initiated. This printing mode lets you print with a single print cartridge, but it slows the product and affects the quality of printouts.

The print carriage is stalled

Try the following solutions to resolve the issue. Solutions are listed in order, with the most likely solution first. If the first solution does not solve the problem, continue trying the remaining solutions until the issue is resolved.

Solution 1: Print a self-test report

Solution 2: Clear the print carriage

Solution 3: Check the power source

Errors 187

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Image 190
HP F4280, F4240, F4235 manual Printing in ink-backup mode, Print carriage is stalled