Printing from computer is fine however, "black" bleeds over anything copied from tray

[Harvard1971]

Printer is an HP Office Jet Pro 6978 and has been working fine.  NO changes since yesterday when it worked fine.  As I said problem only exists coping from the printer; printing from the computer: NO ISSUES!!

[Echo_Lake]

@Harvard1971

Thank you for posting on the HP Support Community.
 

Don't worry as I'll be glad to help. Let's try these steps to resolve the issue: 

Reset the printer to recover from printer errors or failures.

1. If your printer has a rechargeable battery, remove it.

2. With the printer turned on, disconnect the power cord from the printer.

3. Unplug the power cord from the power source.

4. Wait 60 seconds.

5. Reconnect the power cord to a wall outlet and to the printer.

   NOTE: HP recommends plugging the printer directly into a wall outlet.

6. Turn on the printer to complete the reset.

Check scanner bar functionality

If you have a flatbed scanner, watch the scanner bar while scanning to see if it is working properly.

1. Remove any original documents or photos from the scanner glass.

2. Lift the scanner lid slightly, and then press the Copy button or icon.

3. Look at the scanner. The scanner bar should illuminate and travel across the length of the glass.

   If the scanner light does not illuminate or move,  it could be a hardware failure. 

Hope this helps! Keep me posted for further assistance.
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