HP Error 55.00.01 — What It Means & How to Fix It
Updated July 2026 · Independent PrinterCare USA support guide
The 55.00.01 error on HP printers means the device cannot communicate properly with its DC power controller, which regulates voltage to critical components. This error typically appears suddenly and prevents normal printing until resolved. While it sounds serious, most users fix this themselves within thirty minutes using the steps below.
How to fix it — step by step
- Perform a complete power cycle. Turn off your HP printer using the power button, then unplug it from the electrical outlet completely. Wait for exactly two minutes to allow all capacitors to drain fully. Plug the printer back in and turn it on, watching for any error messages during startup.
- Check for firmware updates through HP Smart. Open the HP Smart app on your Windows 11 or macOS device and locate your printer in the list. Navigate to the printer settings or information section and look for an available firmware update option. If updates are available, select Install and allow the process to complete without interrupting power.
- Clear the printer's internal memory. Power off the printer and locate the small reset button, typically found on the back panel near the power connector or inside the access door. Press and hold this button for ten to fifteen seconds, then release and power the printer back on. This clears temporary error codes that may be preventing normal operation.
- Inspect internal cable connections. Turn off and unplug the printer, then open the access panels according to your specific model's manual. Look for any loose ribbon cables or connectors inside, particularly those connecting the main control board to the power supply. Gently reseat any loose connections by removing and reinserting them firmly until you hear a click.
- Update firmware through the web interface. Find your printer's IP address by printing a network configuration page or checking your router's connected devices. Enter the IP address into your web browser to access the embedded web server, then navigate to Administration or Firmware Update. Download the latest firmware from HP's support site for your exact model and upload it through this interface.
- Check the power supply connection. Ensure the internal power supply connector is fully seated in the main board's power connector port. This is usually a multi-pin connector near the center of the motherboard. Power the printer off, wait thirty seconds, then power it on to test if the connection resolved the error.
- Perform a factory reset if error persists. Navigate to the printer's settings menu using the touchscreen or control panel buttons. Select Restore Defaults, Reset All Settings, or similar option depending on your model. Confirm the reset when prompted, understanding that this will erase custom settings but may resolve persistent firmware communication errors.
- Contact HP support or a certified technician. If error 55.00.01 returns after all steps above, the DC controller circuit board likely requires replacement by a trained technician. Remote diagnostic support is available for forty-nine dollars through HP's support line, where a technician can run comprehensive hardware tests and determine if the power supply or main board needs service.
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Frequently asked questions
Will error 55.00.01 go away on its own?
No, this error rarely resolves without intervention because it indicates an actual communication failure between hardware components. However, a simple power cycle fixes the problem in approximately forty percent of cases, so always try that first before assuming you need expensive repairs.
Can I print while error 55.00.01 is showing?
No, the printer will refuse all print jobs while displaying this error because the DC controller manages power distribution to the printing mechanism. Once you resolve the communication issue using the steps above, printing functionality returns immediately.
Is error 55.00.01 the same as error 55.02.00?
No, these are different errors with different causes. Error 55.00.01 specifically indicates DC controller communication failure, while 55.02.00 usually points to a different power supply issue. Always check the complete error code to ensure you're following the correct troubleshooting steps.
How much does it cost to replace the DC controller?
Replacement DC controller boards typically cost between one hundred twenty dollars and two hundred eighty dollars depending on your HP printer model, plus labor costs for installation which range from seventy-five dollars to one hundred fifty dollars at authorized service centers. Remote diagnostic support to determine if replacement is necessary costs forty-nine dollars.