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Restart Printer
Possible Causative Parts: MCU
Power cycle the printer several times by turning off using the switch on the back and turning on.
Allow the printer to fully initialize and repeat.
If the error reoccurs, Contact Dell Technical Support
003-343 Restart Printer
Possible Causative Parts: MCU
This is a firmware mismatch error.
It should ONLY come up if the MCU is being replaced and the tech did not save the settings to the printer first and then reinstate the settings to the new MCU.
If there is no tech onsite replacing the MCU and user gets this error, Reset NVRAM.
If error still occurs, Contact Dell Technical Support