Index 89Chapter 4 Installing Optional Components4.1 Installation PrecautionsBefore you install any system component, we recommend that you read the following sections. These sectionscontain important ESD precautions, pre- and post-installation instructions.Turn off the system power and unplug thepower cord and all peripherals beforeopening the system or connecting orremoving any peripheral device. Always turnon any external peripheral device before youturn on the system.To avoid damaging the system, do not openthe housing for service or upgrades, unlessyou are a qualified technician.
