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.Laser safety informationCAUTION:When laser products (such as CD-ROMs, DVD drives, fiber optic devices, or transmitters) areinstalled, note the following:• Do not remove the covers. Removing the covers of the laser product could result in exposure tohazardous laser radiation. There are no serviceable parts inside the device.• Use of controls or adjustments or performance of procedures other than those specified hereinmight result in hazardous radiation exposure.DANGERSome laser products contain an embedded Class 3B laser diode. Note the following:Laser radiation when open. Do not stare into the beam, do not view directly with opticalinstruments, and avoid direct exposure to the beam.58 User Guide