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We would like to share some of the most frequently asked questions about Instant Ink. Check out this link: HP INSTANT INK, HP+ PLANS: INK AND TONER. .
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Cartridge replacement HP8720

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Dell Latitude 3570 laptop
Microsoft Windows 10 (64-bit)

How do I find out which cartridge needs replacement. The message says just change cartridge and the same when I check ink level on the screen

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Hi @KiwiBill


Welcome to the HP Support Community. I'd be happy to assist you


Due to the current global COVID-19 situation, we're seeing an influx of customers coming in for support. We appreciate your patience.

As you're getting an error on the printer screen, check the ink levels on the computer


Check ink levels (Windows)

Use one of the following methods to check your ink or toner levels from your Windows computer.

  • HP Smart app (Windows 10): Download the HP Smart app (in English) from the Windows store. Add your printer to view ink or toner levels on the home screen.

    HP Smart home screen
  • HP Print and Scan Doctor: Download and run HP Print and Scan Doctor. Select your printer, click Printer in the top menu bar, and then click Supply Levels.

    Supply Levels menu in HP Print and Scan Doctor
  • Printer software: Search Windows for HP, and then click your printer name or HP Solution Center. Click Maintain Your Printer, if necessary.

    Example of Estimated Ink Levels in HP Printer Assistant

    If you have not installed the HP printer software, go to HP Software and Driver Downloads. Identify your printer, and then follow the on-screen instructions.

Hope this helps! Keep me posted. 


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