Electrical current safety informationDANGERElectric current from power, telephone, and communication cables is hazardous.To avoid a shock hazard:• Do not use your computer during a lightning storm.• Do not connect or disconnect any cables or perform installation, maintenance, or reconfigurationof this product during an electrical storm.• Connect all power cords to a properly wired and grounded electrical outlet.• Connect properly wired outlets to any equipment that will be attached to this product.• Whenever possible, use one hand only to connect or disconnect signal cables.• Never turn on any equipment when there is evidence of fire, water, or structural damage.• Disconnect the attached power cords, battery, and all the cables before you open the devicecovers, unless instructed otherwise in the installation and configuration procedures.• Do not use your computer until all internal parts enclosures are fastened into place. Never usethe computer when internal parts and circuits are exposed.DANGERConnect and disconnect cables as described in the following procedures when installing, moving,or opening covers on this product or attached devices.To connect:1. Turn everything OFF.2. First, attach all cables to devices.3. Attach signal cables to connectors.4. Attach power cords to outlets.5. Turn devices ON.To disconnect:1. Turn everything OFF.2. First, remove power cords from outlets.3. Remove signal cables from connectors.4. Remove all cables from devices.The power cord must be disconnected from the wall outlet or receptacle before installing all other electricalcables connected to the computer.The power cord may be reconnected to the wall outlet or receptacle only after all other electrical cables havebeen connected to the computer.DANGERDuring electrical storms, do not perform any replacement and do not connect the telephone cableto or disconnect it from the telephone outlet on the wall.Appendix A. Important safety information 27