HP 1055CM manual Printhead Status Messages While Replacing

	HP No.80 Ink Supplies Troubleshooting
Monitor	When this message is displayed it means that the printhead has
	reached its life expectancy.
	To find out how to see the amount of ink consumed by the printhead and
	the usage time, go to page 3-9,Obtaining Printhead Information.
	Printhead life is anticipated to be 700ml or twelve months (9,000
	hours) in the printer, whichever occurs first, provided that the
	printhead is used under normal operating conditions (using HP ink
	cartridges only) and its “install before date” has not lapsed.
	However results vary depending on the print quality setting used.
	The printer will attempt to warn the user when this stage is reached
	with the monitor message.
	Even with the monitor message being displayed good image quality
	can still be obtained, but it could start degrading. The customer will
	have to check the images being printed and decide if they are of an
	acceptable print quality. If the customer wants to ensure optimum
	print quality with maximum unattendedness, they should consider
	buying a new printhead and replacing the old printhead with a new
	one.
	Printhead Status Messages While Replacing
	The following are the printhead status messages that may be
	displayed while replacing the Printheads.
Setup	The Printer has detected that a Setup Printhead is installed.
Used	The Printer has detected that a USED Setup Printhead is installed.
Insert	No Printhead has been detected in that Carriage stall. If a Printhead
	is installed in the Carriage stall when this status message is shown:

1Reseat the Printhead, making sure it is installed correctly.

2Clean the Carriage and Printhead flex circuits using the Carriage Interconnect Wiper ⇒ Page 3-18.

3Replace the Printhead.

4Perform the Electronic Systems Test ⇒ Page 4-5.

NOTE	If all 4 Printheads are installed but have the Status message
	"Insert", it is possible that the Carriage Assembly is faulty.

HP DesignJets 1050C and 1055CM Printers Service Manual 3-15