HP Officejet Pro 6978 not printing black issue can arise due to various reasons. The black ink cartridge sometimes may not be seated properly into the cartridge slot during replacement. Carry out the solutions listed below to fix the problem.
SOLUTIONS FOR THE HP OFFICEJET PRO 6978 NOT PRINTING BLACK
- Confirm if the printer is plugged to the wall outlet.
- Remove all the ink cartridges from your 123.hp.com/ojpro6978 printer.
- Attempt to perform a hard reset on the printer.
- Unplug the power cord with the device turned on.
- Detach the USB cable and wait for about 2-3 minutes.
- Try to press and hold the Power button for at least 30 seconds.
- Reconnect the cord, turn on the printer, and insert the cartridges.
- Take a print of test page to check the issue.
GUIDELINES TO FIX HP OFFICEJET PRO 6978 NOT PRINTING BLACK
- Clean the printhead to clear the clogs on it for restoring the print quality. Make use of an automated tool from the printer control panel to clean the printhead.
- Click the Setup icon on the control panel. Go to the Printer Maintenance menu and click Clean Printhead. Wait until the printer performs cleaning and prints a test page.
- Collect the test page from the output tray and examine it. Check the print quality on the test page. Select Clean Again if you are not satisfied with the print quality.
- Click Done if the print quality is acceptable. Repeat the process to clean the printhead for the third time if necessary. Wait for at least 30 minutes before performing all three levels of cleaning.
- Ensure that you use genuine ink cartridges to make prints. The printer may not detect the non-HP products. If you use similar products, these solutions may not fix the quality issue.
- Check the ink cartridge accessibility before you install it into the HP printer. Look at the back of printouts for any ink smears. Clear the smears on the paper using an automated tool.
- Load a plain A4 paper and click the Setup menu. Open the Tools or Printer Maintenance menu and click Clean Page Smears. The printer creates noise during this process.
- Wait until the printer clears the issue and prints a page. Check whether you load the relevant paper for making prints. Confirm if the paper is loaded with the print side down.
- Look into the paper whether it has no curls and wrinkle-free. Check the quality of the loaded paper. Some paper will not absorb the ink.
- Check the print settings on your system whether you have enabled the Black and White option. Examine the ink cartridge ink levels and replace it if necessary.