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09-14-2025 03:33 AM
Hi @Cher4357
Welcome to the HP Support Community! We're here to help you get back up and running.
Thanks for reaching out—it's genuinely frustrating when a fresh cartridge doesn’t deliver the results you expect.
Let’s walk through a few targeted steps to help restore black printing on your HP OfficeJet 6978 with the new 902 XL cartridge.
Step-by-Step Troubleshooting
1. Check Cartridge Vent and Seating
Sometimes, a small plastic tab or clogged vent can block ink flow.
- Remove the black cartridge and inspect the vent hole (small circular opening on top).
- Gently clean it with a lint-free cloth.
- Reinstall the cartridge firmly—ensure it clicks into place.
2. Run Printhead Cleaning Cycles
This clears dried ink or air bubbles from the nozzles.
- On the printer’s control panel, go to:
Setup > Printer Maintenance > Clean Printhead - Run the cycle up to three times, allowing a few minutes between each.
3. Print Diagnostic Page
This helps confirm whether the issue is isolated to black ink.
- Navigate to:
Setup > Reports > Print Quality Report - If black is missing or faint, it confirms a printhead or cartridge issue.
4. Try the Old Cartridge (if available)
If your previous black cartridge still has ink, reinstall it briefly to test whether the issue is with the new cartridge or the printhead.
5. Update Firmware
Outdated firmware can cause cartridge recognition or ink flow issues.
- Visit the HP OfficeJet 6978 Firmware Update Page
- Download and install the latest firmware for your printer model.
6. Reset the Printer
This clears internal memory and may resolve ink detection issues.
- With the printer powered on, disconnect the power cable from the back
- Wait 60 seconds
- Reconnect and power on
If the issue persists after these steps, it may be worth testing a replacement cartridge or requesting support for a potential printhead fault. I’m here to help you through that process if needed.
Let’s get your printer back to full functionality.
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Take care, and have an amazing day!
Regards,
Hawks_Eye