HP Officejet Pro K550 Printer - Manual (Page 68)

Light description /Light pattern Explanation and recommended action
The Power light and the Resume light blink, and one or
more of the ink cartridge lights are on. One or more of the ink cartridges have expired.
CAUTION Printer services or repairs required
as a result of using expired ink cartridges will not
be covered under warranty.
● Replace the ink cartridge indicated.
● If you choose to use the expired ink cartridge, press
and hold ( Power button), and press ( Resume
button) three times. All lights except the Power light
go off. Damage that results to the printer from using
this cartridge is not covered under the warranty.
The Power light is on, and one or more of the printhead
lights blink. One or more of the printheads are missing.
● Install the printhead indicated, and then try to print.
● If the error persists, replace the printhead indicated.
The Power light, and one or more of the printhead lights
blink. One or more of the printheads are faulty or need attention.
● Ensure the printhead indicated is properly installed,
and then try to print. Remove and reinsert the
printhead if necessary.
● If the error persists, replace the printhead indicated.
The Power light is on, and one or more of the ink cartridge
lights blink. One or more of the ink cartridges are missing.
● Install the ink cartridge indicated, and then try to print.
● If the error persists, replace the ink cartridge indicated.
One or more of the ink cartridges are out of ink and must
be replaced before you can continue printing.
▲ Replace the ink cartridge indicated.
The Power light, and one or more of the ink cartridge
lights blink. One or more of the ink cartridges are faulty or need
attention.
● Ensure the ink cartridge indicated is properly
installed, and then try to print.
● If the error persists, replace the ink cartridge indicated.
60 Chapter 5 Printer lights reference ENWW