HP Color Inkjet cp1160 Printer series - Manual (Page 128)

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ink cartridge needs to be replaced
If an ink cartridge expires or runs out of ink, it needs to be replaced.
For instructions on replacing an ink cartridge, see replacing ink cartridges .
printheads need to be replaced
If multiple printheads fail, the printer may stop printing.
For instructions on replacing printheads, see replacing printheads .