iiiInformation for your safety andcomfortSafety instructionsRead these instructions carefully. Keep this document for future reference.Follow all warnings and instructions marked on the product.Turning the product off before cleaningUnplug this product from the wall outlet before cleaning. Do not use liquidcleaners or aerosol cleaners. Use a damp cloth for cleaning.CAUTION for plug as disconnecting deviceObserve the following guidelines when connecting and disconnecting power tothe power supply unit:Install the power supply unit before connecting the power cord to the ACpower outlet.Unplug the power cord before removing the power supply unit from thecomputer.If the system has multiple sources of power, disconnect power from the systemby unplugging all power cords from the power supplies.CAUTION for AccessibilityBe sure that the power outlet you plug the power cord into is easily accessibleand located as close to the equipment operator as possible. When you need todisconnect power to the equipment, be sure to unplug the power cord from theelectrical outlet.CAUTION for bundled dummy cards (only for certain models)Your computer shipped with plastic dummies installed in the card slots.Dummies protect unused slots from dust, metal objects or other particles. Savethe dummies for use when no cards are in the slots.CAUTION for ListeningTo protect your hearing, follow these instructions.• Increase the volume gradually until you can hear clearly and comfortably.• Do not increase the volume level after your ears have adjusted.• Do not listen to music at high volumes for extended periods.• Do not increase the volume to block out noisy surroundings.• Decrease the volume if you can't hear people speaking near you.