HP LaserJet Pro M404dn Mono Laser Printer with 40 ppm, Ethernet, and Duplex Printing 55.XX Error Fix: DC Controller Communication Error

Error code 55.XX on the HP LaserJet Pro M404dn Mono Laser Printer with 40 ppm, Ethernet, and Duplex Printing means: DC Controller Communication Error. Internal communication failure between the DC controller board and the formatter — this is a critical internal error; power cycle; if persistent, the DC controller or formatter board needs replacement; this error is more common on higher-volume models like the M404dn that have more complex internal electronics

The most successful fix is "Replace DC Controller or Formatter Board" (hard difficulty, ~60 minutes). Estimated DIY cost: $10-$20. HomeMD has 2 community-ranked fixes for this error.

This error is rated medium severity. It should be addressed soon, but your appliance may still function in a limited capacity.

Yes — the top-ranked community fix ("Replace DC Controller or Formatter Board") is rated hard difficulty and takes about 60 minutes. Tools needed: T15 Torx screwdriver, Anti-static wrist strap.

DIY cost: $10-$20. Professional repair typically costs $200-$300. Many homeowners save money by trying the top-ranked community fix first.

The HP LaserJet Pro M404dn Mono Laser Printer with 40 ppm, Ethernet, and Duplex Printing has 8 other known error codes, including: 10.10.00 (Supply Memory Error), 13.01 (Paper Jam in Tray 1 (Multipurpose 100-Sheet Tray)), 13.02 (Paper Jam in Tray 2 (Main 250-Sheet Cassette)), 13.03 (Paper Jam in Tray 3 (Optional 550-Sheet Tray)), 13.05 (Paper Jam in Fuser Area), and 3 more.