How do I troubleshoot the E3 error on my HP Deskjet GT 5820?

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Grade: Education Subject: Support
How do I troubleshoot the E3 error on my HP Deskjet GT 5820?
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To troubleshoot, first, ensure the ink cartridge is correctly installed, securely clicked into place. Next, check the ink level; if it's low, replace the cartridge. If the cartridge is old or suspect, try replacing it with a new one. Also, check the printer's firmware for updates via the HP Smart app.