61.c4.d3 Error _hot_ -

Download the latest firmware for your specific model from the official HP Support site. If the printer won't boot, you may need to use the Preboot Menu to format the drive and reinstall a fresh copy of the firmware. When to Contact Support

Turn off the printer, disconnect the power, and carefully remove the formatter assembly handle at the front or back (depending on the model). Ensure all internal connectors are firmly seated before sliding it back in. 61.c4.d3 error

A standard reset can often clear temporary firmware glitches that trigger 61.xx errors. Turn off the printer using the power button. Download the latest firmware for your specific model

Open all access doors and remove any jammed paper or debris. Ensure all internal connectors are firmly seated before

For PageWide models, check the small interior space in the top left corner to see if the print-bar is in the "up" or "down" position. A black block visible in the opening indicates it is correctly in the "up" position. 3. Troubleshoot the Formatter Board