
Experiencing 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 cover and carefully extract any visible jammed paper. Be thorough and check for any small paper fragments or any foreign objects that might be lodged inside; remove anything you find. Once you've cleared the obstruction, securely close the printer cover. Finally, reconnect the power cord and turn your HP printer back on. If the error message continues to appear after these steps, we recommend visiting hp.com/support for further troubleshooting and assistance. Always consult your HP M139-M142 Series LaserJet MFP user guide for detailed instructions to prevent potential damage during the paper jam removal process.


