To replace the USB keyboard or mouse, do the following:1. Disconnect the old keyboard cable or mouse cable from the computer.2. Connect a new USB keyboard or mouse to one of the USB connectors on the computer.Figure10. Connecting the USB keyboard or mouseReplacing the wireless keyboard or mouseAttention:Do not open your computer or attempt any repair before reading and understanding the “Important safety information”on page v.Replacing the wireless keyboardTo replace the wireless keyboard, do the following:1. Remove your failing wireless keyboard.2. Take out the new wireless keyboard from the package.3. Open the battery compartment cover, and Install two AAA batteries according to the polarity indicators.Figure11. Installing the keyboard batteries4. Take away the USB dongle from the keyboard compartment or from the wireless mouse compartmentand connect it to an available USB connector on the computer. See “Replacing the wireless mouse”on page 35.5. Close the compartment cover. The keyboard is ready for use.34 ThinkCentre M83z User Guide