HP Deskjet 3740 series printer

Installed print cartridge

 

Result

Black print cartridge.

 

Colors are printed as grayscale.

Tri-color print cartridge.

 

Colors print but black is grayed and is not a true black.

Exiting ink-backup mode

Install two print cartridges in the printer to exit the ink-backup mode.

For instructions about installing a print cartridge, see the print cartridge installation page.

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HP 3748 manual Exiting ink-backup mode