Chapter 10

8.Clean the electrical contacts in the printhead slot inside the device with a clean, dry, soft and lint-free cloth.

9.Plug in the power cord and turn on the device. The control panel should indicate that the printhead is missing.

10.Insert the printhead into its color-coded slot (the label on the printhead must match the label on the printhead latch). Press down firmly on the printhead to ensure proper contact.

11.Pull the printhead latch all the way forward, and then press down to ensure that the latch is properly engaged. You might have to apply some pressure to engage the latch.

12.Where necessary, repeat the above steps for the remaining printhead.

13.Close the top cover.

14.If the control panel message remains, repeat the cleaning procedure described above for the printhead which corresponds to the message.

15.If the control panel message remains, replace the printhead which corresponds to the message.

16.Wait while the device initializes the printheads and prints the alignment pages. If the device does not print the pages, start the alignment process manually. For more information, see To align the printheads.

To replace the printheads

NOTE: To find out which printheads work with your printer, see Supplies.

1.Open the top cover.

2.If the carriage does not move to the left automatically, press and hold the OK button for 5 seconds. Wait for the carriage to stop moving.

150 Maintain and troubleshoot

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HP Pro L7650, Pro L7750, Pro L7680, Pro L7580, Pro L7780, Pro L7555, Pro L7550, Pro L7590 manual To replace the printheads