To fix HP printer not responding issues, start by checking the printer's connection to your computer or network. Ensure cables are properly connected, or troubleshoot wireless connectivity problems. Restart both the printer and your computer to refresh connections. Install the most recent firmware and printer drivers. Use the HP Print and Scan Doctor tool to diagnose and resolve common printing problems automatically. Verify if the printer is set as the default device in your computer's settings. If issues persist, reinstall the printer software. Additionally, check for any hardware issues like paper jams or low ink levels. These steps can help resolve HP printer not responding issues efficiently.