HP EliteDesk 800 95W G4 Maintenance and Service Guide - Page 80
Solving keyboard and mouse problems
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Printer will not print. Cause If you are on a network, you may not have made the connection to the printer. Printer may have failed. Solution where [printer port] is the address of the printer being used. If the printer works, reload the printer driver. To run MS-DOS commands, press the Windows key + r, type cmd in the Open box, and then click OK. Make the proper network connections to the printer. Run printer self-test. Printer will not turn on. Cause The cables may not be connected properly. Solution Reconnect all cables and check the power cord and electrical outlet. Printer prints garbled information. Cause The correct printer driver for the application is not installed. The cables may not be connected properly. Printer memory may be overloaded. Solution Install the correct printer driver for the application. Reconnect all cables. Reset the printer by turning it off for one minute, then turn it back on. Printer will not print. Cause The printer may be out of paper. Solution Check the paper tray and refill it if it is empty. Solving keyboard and mouse problems If you encounter keyboard or mouse problems, see the documentation that came with the equipment and to the common causes and solutions listed in the following table. A wireless keyboard/mouse is not working correctly. Symptoms include lagging mouse movement, jumpy mouse/keyboard, or no function of mouse/keyboard and external drive. Cause Solution If your computer is equipped with USB 3.0 ports, connected USB 3.0 devices can interfere with the wireless keyboard USB receiver. Connect the wireless keyboard USB receiver to a USB 2.0 port that is separated from ports with USB 3.0 devices. If you still experience interference, you may have to place the connectors farther apart using an external USB hub. 72 Chapter 6 Troubleshooting without diagnostics