Lenovo ThinkPad 240 ThinkPad 240 User's Reference that shipped with the system - Page 111
Audio problems, Universal serial bus (USB) problems, Problem, Action, Start, Settings, Control Panel
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Troubleshooting charts Audio problems Problem General problems. Action Problems may be due to such factors as: The audio cable configuration is not correct for your application. The audio cable is defective. The audio equipment is defective. Check if: The audio function is enabled. The mute is off. Universal serial bus (USB) problems Problem A device connected to the USB connector does not work. Action 1. Make sure that the USB device is connected correctly. 2. Open the "Device Manager" window, and make sure that the USB device setup is correct, and that computer resource assignment and device driver installation are correct. Note: To open the "Device Manager" window, click Start and move the cursor to Settings and click Control Panel. Double-click System; then click the Device Manager tab in the "System Properties" window. Chapter 4. Solving computer problems 99