How to Fix HP 50.4 Fuser Error

The 50.4 Fuser Error on HP printers indicates: Fuser heater failure or power supply issue.

Step 1: Perform a Hard Reset

Before disassembling any hardware, force the printer to clear its volatile memory.

1. Turn the printer on.
2. Disconnect the power cord from the rear.
3. Wait 60 seconds.
4. Reconnect and power on.

Step 2: Inspect Hardware Components

1. Open the access door.
2. Verify all cartridges or toners are seated securely.
3. Check for any jammed paper or foreign objects in the carriage path.

Step 3: Specific Component Verification

For 50.4 Fuser Error, the issue is localized to the fuser.

• Carefully inspect the electrical contacts and clean them with a lint-free cloth lightly dampened with distilled water.
• If the component has permanently failed, consider a replacement part.