Setup and Quick Reference Guide 9When Using Your ComputerAs you use your computer, observe the following safe-handling guidelines.CAUTION: Do not operate your computer with any cover(s) (including computer covers,bezels, filler brackets, front-panel inserts, and so on) removed.• Your computer is equipped with one of the following:– A fixed-voltage power supply — Computers with a fixed-voltage power supply do not have avoltage selection switch on the back panel and operate at only one voltage (see the regulatorylabel on the outside of the computer for its operating voltage).– An auto-sensing voltage circuit — Computers with an auto-sensing voltage circuit do not havea voltage selection switch on the back panel and automatically detect the correct operatingvoltage.– A manual voltage selection switch — Computers with a voltage selection switch on the backpanel must be manually set to operate at the correct operating voltage.Set the switch to the position that most closely matches the voltage used in your location.NOTICE: To help avoid damaging a computer with a manual voltage selection switch, set the switch for thevoltage that most closely matches the AC power available in your location. For Japan, the voltage selectionswitch must be set to the 115-V position even though the AC power available in Japan is 100 V. Also, ensurethat your monitor and attached devices are electrically rated to operate with the AC power available in yourlocation.• Before working inside the computer, unplug the computer to help prevent electric shock or systemboard damage. Certain system board components continue to receive power any time the computeris connected to AC power.
