How to Fix Epson WF-C5790 Error Code 031011: Printhead Electrical Error (HCS Error)

Customer Question:

How can I fix error code 031011 on my Epson WF-C5790 printer?

Answer:

Understanding Error Code 031011 on Epson WF-C5790

The 031011 error on the Epson WF-C5790 refers to a Printhead Electrical Error, specifically an HCS (Head Communication System) error. This fault occurs when communication between the printhead and the printer’s main board cannot be established or maintained. The printer thinks the printhead is either not connected properly or entirely missing.

Possible Causes of Error 031011:

1. Printhead Failure

   • The most common cause of this error is the printhead’s internal electronics failure. If any circuit within the printhead has shorted or is open, the printer cannot detect it correctly.

   • In this case, the only resolution may be replacing the printhead entirely.

2. FFC (Flat Flexible Cable) Disconnection or Misalignment

   • The flat cables that connect the printhead to the main board may have come loose or been inserted at an angle. This is especially common after attempted DIY repairs or if the printer was moved roughly.

   • Opening the printer and reseating or replacing the FFC cables can resolve the issue.

3. Main Board Issues: Disconnection or Short Circuit

   • Damage or faults on the main logic board may prevent proper signal transmission between the printer and the printhead.

   • A short circuit or a blown component on the board can trigger this error. Diagnosing it requires electrical testing, which should only be done by someone with experience in board-level repairs.

Suggested Troubleshooting Steps:

• Power Cycle the Printer
  Before opening the printer, unplug it completely, wait at least 5 minutes, and then plug it back in. Sometimes, static buildup or temporary power faults can trigger this error.

• Inspect Printhead Cables
  If you are comfortable opening your printer:

  • Check the flat ribbon cables running to the printhead.

  • Ensure they are clean, undamaged, and properly seated.

  • If possible, remove and reinsert them gently but securely.

• Check for Burn Marks or Smell
  If there’s a burnt electronics smell or visual signs of damage near the printhead or board, it’s very likely that a component has failed and needs replacement.

• Replace the Printhead or Main Board (if necessary)
  If all connections look good but the error persists, the printhead or the mainboard must be replaced. Given the cost, this is often where users evaluate whether it's worth repairing the unit or replacing it.

You can also view a related discussion and technical breakdown on our YouTube video comment thread (https://www.youtube.com/watch?v=Z9RuAxEr81g&lc=UgxNdotzOOvpyeLh_E94AaABAg).

Addressing printer issues can be a complicated affair due to the hands-on nature of the problems. So, we're unable to provide remote troubleshooting, suggestions, or support for printer repairs. We offer an in-person evaluation and repair service via our local diagnostic facility (https://bchtechnologies.com/printer-repair-service). Given the high demand, we operate on a first-come, first-served basis. So, it might take a few weeks before we can get your printer to drop it off. Our services are structured to repair either a whole printer or specific parts, with clear instructions on how to proceed. However, we acknowledge that our rates aren't the most economical. Thus, we highly recommend that you resort to self-help via online research. You can start by checking out YouTube or visiting our YouTube channel's homepage (https://youtube.com/@bchtechnologies). Look for specific videos using the search icon next to "About" on the right-hand side of the menu bar. I receive dozens of queries every day asking about videos for specific topics. Having created videos over the past nine years, it's challenging to remember every single one. Therefore, using YouTube's search function would be most efficient. Plus, YouTube might suggest relevant videos from other channels that could assist you.

Thanks again for reaching out to us. Your questions help not just you, but the broader community of printer users facing similar challenges.