Lenovo L171 User Manual page 8

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L171 Flat Panel Monitor User's Guide
2. Connect the analog signal cable to the video port on the back of the computer.
Note: One end of the signal cable is already pre-attached to your monitor.
3. Insert the power cord into the monitor, then plug the monitor power cord and
the computer cord into grounded electrical outlets.
4. Power on the monitor and the computer.