MAJ 10/09/15Error U051 means "no print head installed. Install the print head". It's a cartridge error or the printhead is defective.
- Reinstall the cartridges; change the cartridges if the error persists.
- 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.