HP Color LaserJet Enterprise Flow MFP 6800 User Guide - Page 251
Poor physical connection, The computer is unable to communicate with the printer
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Poor physical connection Check the cable connections. 1. Verify that the printer is attached to the correct network port using a cable of the correct length. 2. Verify that cable connections are secure. 3. Look at the network port connection on the back of the printer, and verify that the amber activity light flashes indicating network traffic, and the green link-status light is continuously lit indicating a network link. 4. If the problem continues, try a different cable or port on the hub. The computer is unable to communicate with the printer Verify that the printer is communicating with the network and your computer. 1. Test network communication by pinging the network. a. Open a command-line prompt on your computer. ● For Windows, click Start, click Run, type cmd, and then press Enter. ● For macOS, go to Applications, then Utilities, and open Terminal. b. Type ping followed by the IP address for your printer. c. If the window displays round-trip times, the network is working. 2. If the ping command failed, verify that the network hubs are on, and then verify that the network settings, the printer, and the computer are all configured for the same network (also known as subnet). 3. Open the printer properties and click the Ports tab. Verify that the current IP address for the printer is selected. The printer IP address is listed on the printer configuration page. 4. If you installed the printer using the HP standard TCP/IP port, select the box labeled Always print to this printer, even if its IP address changes. 5. If you installed the printer using a Microsoft standard TCP/IP port, use the printer's hostname instead of the IP address. 6. If the IP address is correct, delete the printer and then add it again. 7. Reinstall the printer software and driver. The printer is using incorrect link and duplex settings for the network HP recommends leaving these settings in automatic mode (the default setting). If you change these settings, you must also change them for your network. New software programs might be causing compatibility problems Verify that any new software programs are correctly installed and that they use the correct print driver. Poor physical connection 239