Error U051 on Canon Printers

Failure: no print head installed. Install the print head. Cartridge Error

Solution 1:
  • Press the triangle button for 5 seconds.

Solution 2:
  • Reinstall the cartridges; change the cartridges if the error persists.

Solution 3:
  • If the error persists: verify that the contacts on the cartridges and the ink cartridge are clean and unscratched.
  • Finally, it is possible that the printhead is defective.

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