I have had a similar HP Officejet Pro x476dw error code about a year back. I do not know what the technician did but from the looks of it, I thought I could resolve it myself. I am using anHP Officejet Pro X476dw MFP and the error message displayed from my printer is 0x6100002d. I would be very thankful if you can provide me with the steps on how to resolve the error code 0x6100002d.
I found this video for HP officejet pro x476dw mfp very helpful for me. The steps illustrated in this video is for hp officejet pro x476dw error code 0x6100002d. The video link is from the HP Support Youtube channel. I hope this helps.