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Common problems HP Solution Center not working : Adobe Flash Player Error and Unable to scan
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‎08-24-2025 10:03 AM

HP Recommended

unable to get connected in hp print and message populated that unknown cartridge used..

1 REPLY 1

‎08-26-2025 11:53 AM

HP Recommended

Hi @inder91,

Welcome to the HP Support Community.
 

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

If your HP printer is not connecting to HP Smart and shows an “Unknown cartridge used” message, here’s how to troubleshoot both issues:

Part 1: Fix “Unknown Cartridge Used” Error

This usually means the printer is rejecting the cartridge due to:

  • Non-genuine or refilled cartridge
  • Region mismatch (e.g., using US cartridges in an India-region printer)
  • Cartridge chip error or damage
     

Try These Steps:

  1. Power Reset
    • Turn off the printer and unplug it for 60 seconds.
    • Plug it back in and turn it on.
       
  2. Reinsert the Cartridge
    • Remove the cartridge.
    • Gently clean the gold contacts with a lint-free cloth.
    • Reinsert firmly.
       
  3. Check Cartridge Authenticity
    • Look for the HP security label on the cartridge box.
    • Use the HP Cartridge Authentication Tool
       
  4. Update Printer Firmware

 

Part 2: Fix HP Smart App Not Connecting

Steps to Reconnect:

  1. Reset Network Settings on Printer
    • On the printer control panel, go to Settings > Network > Restore Network Defaults.
       
  2. Re-add Printer in HP Smart
    • Open HP Smart on your PC or phone.
    • Click Add Printer and follow the steps to reconnect via Wi-Fi.
       
  3. Ensure Same Network
    • Make sure your printer and device are on the same Wi-Fi network.
    • Avoid guest networks or VPNs.
       
  4. Temporarily Disable Firewall/Antivirus
    • Sometimes, security software blocks HP Smart from detecting the printer.

 

I hope this helps.

 

Take care and have an amazing day!
 

Did we resolve the issue? If yes, please consider marking this post as "Accepted Solution" and click "Yes" to give us a helpful vote - your feedback keeps us going!

 

Regards,

VikramTheGreat

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