Where can I find additional troubleshooting help, videos, and the full user guide for the HP LaserJet M109/M112?
You can find printer information, troubleshooting resources, and videos by visiting hp.com/support. Enter your model name on the support website to locate your specific printer's resources, including the complete list of light patterns and the full user guide. (Page 3)
From the official HP Laserjet M109 M112 Printer manual, page 3
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