
Encountering a paper jam error (Er/04, Er/05, or Er/06) on your HP M139-M142 Series LaserJet MFP? Here's how to resolve it: First, power off your printer and disconnect the power cord from the outlet. Next, open the printer's access cover. Carefully remove any visible jammed paper, taking care not to tear it. Thoroughly inspect the printer's interior for any remaining fragments of paper or any foreign objects, and remove them. Once you've cleared the obstruction, securely close the printer cover. Reconnect the power cord and turn your printer back on. If the error message continues to appear after following these steps, we recommend visiting the official HP support website, hp.com/support, for further troubleshooting assistance. Always consult your HP M139-M142 Series LaserJet MFP user guide for detailed instructions and safety precautions to prevent potential damage to your printer during the paper removal process.


