• Code: 50.2000
• Display: 50.2000
• Description: Slow fuser error
• Remedy:

• Code: 50.3000
• Display: 50.3000
• Description: High fuser temperature error
• Remedy:

• Code: 50.4000
• Display: 50.4000
• Description: Fuser drive circuit error
• Remedy:

• Code: 50.7000
• Display: 50.7000
• Description: Fuser open error. Low sub-thermistor fuser error. High sub-thermistor fuser error
• Remedy:

• Code: 50.X
• Display: 50.X Fuser Error
• Description: The product has an internal hardware error.
• Remedy: 1. Press the power button to turn the product off.2. If a surge protector is in use, remove it. Connect the power cord directly into a wall outlet.3. Wait at least 25 minutes, turn the product on, and then wait for the product to initialize.4. If the error persists, reconnect J101 and J552 on the engine controller PCA.5. If the error persists, check the power source. Make sure that the power source meets the minimum system requirements (40Hz to 70Hz).6. If the error persists, replace the fuser.7. If the error persists, replace the engine controller PCA.

• Code: 51.0000
• Display: 51.0000
• Description: Beam detect or laser error
• Remedy:

• Code: 51.2000
• Display: 51.2000
• Description: Black scanner laser error (inline devices only)
• Remedy:

• Code: 51.XX
• Display: 51.XX Error
• Description: The printer has experienced an internal hardware error. The product may display the following message: 51.20 Black laser scanner error
• Remedy: Turn off the power by using the power switch, wait at least 30 seconds, and then turn on the power and wait for the printer to initialize. If a surge protector is used, remove it. Plug the printer directly into the wall socket. Use the power switch to turn on the printer. If the message persists, contact HP support.