: Boot the printer with external cables (Fax, Ethernet, USB) and optional trays (like Tray 3) removed to see if a faulty accessory is causing the conflict. HP Support Community
For persistent errors, you may need to use the to format the drive and reinstall a clean copy of the firmware. MFP Printer Code Errors Unknown - HP Support Community 61.c4.d3 error
Download the latest firmware for your specific model from the HP Support Site . Apply the update via a USB flash drive or the HP Smart app. : Boot the printer with external cables (Fax,
Share your experience in the comments below — your solution might help someone else facing the same problem. 61.c4.d3 error
A stall in the service sled motor or a failing printhead wiper . Troubleshooting Steps
: Boot the printer with external cables (Fax, Ethernet, USB) and optional trays (like Tray 3) removed to see if a faulty accessory is causing the conflict. HP Support Community
For persistent errors, you may need to use the to format the drive and reinstall a clean copy of the firmware. MFP Printer Code Errors Unknown - HP Support Community
Download the latest firmware for your specific model from the HP Support Site . Apply the update via a USB flash drive or the HP Smart app.
Share your experience in the comments below — your solution might help someone else facing the same problem.
A stall in the service sled motor or a failing printhead wiper . Troubleshooting Steps