Error code - 0x6100004a

[Clifton52]

HP OfficeJet Pro 6978

[Sneha_01]

Hi @Clifton52 

Welcome to HP Support Community.

Thank you for posting your query, I will be glad to help you.

• Make sure the cartridge access door is closed
• To avoid errors or other problems, make sure the cartridge access door is fully closed.
• Open the cartridge access door.
• 
• Remove the paper path cover, and remove any torn paper, labels, or other obstruction that might be inside.
• 
• Reinsert the paper path cover, making sure it is fully inserted into the printer so that it does not interfere with closing the access door.
• Close the door, ensuring it is fully seated.
• Clear the error message
• Remove the ink cartridges and retart the printer to clear the error message.
• Press the power button to turn off the printer.
• With the printer off, open the cartridge access door.
• 
• Turn the power on and wait for the carriage to move.
• With the printer on, unplug the printer from power.
• Remove the ink cartridges and set them aside. It might be necessary to manually slide the carriage to access the cartridges.
• With the access door still open, turn the printer on, and then wait for the printer to complete the start-up sequence.
• Once the carriage returns to the center and the error is clear, install the ink cartridges. If the error does not clear, repeat these steps up to three times.
• Service the printer

I hope this helps.

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