Printer

[Z0-_]

C9C70000 code on a office jet pro 6978

[Garp_senchau]

@Z0-_,

Welcome to HP Support Community,

Thank you for posting your query; I’m here to help by guiding you through steps to resolve this issue

I'm afraid this is a hardware failure with the printer. Power resetting the printer and updating the printer firmware may resolve this issue, let us try these steps: 
Step 1: Reset the printer

1. With the printer turned on, disconnect the power cord from the rear of the printer.

2. Wait at least 60 seconds.

3. Reconnect the power cord to the rear of the printer.

4. Turn ON the printer, if it does not automatically turn on.

5. Wait until the printer is idle and silent before you proceed.

Note: HP recommends connecting the printer directly to a wall outlet rather than a surge protector or a power strip.

Step 2: Update the printer firmware

Click here to download and install the latest firmware from your computer.

You may refer to these documents for more troubleshooting:

• Check if there are any Carriage jam
• Use Diagnose & Fix in HP Smart

Note: If you are able to bypass the error code on the printer screen, a factory reset can be performed on the printer to resolve this issue.

I hope these steps help resolve the issue

Please feel free to reply here if you have any questions or if you need further clarification on any of the steps. 

Take care and have a good day. 

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Regards,