1. Installing Internal Optional DevicesExpress5800/R120g-2E User's Guide 43Chapter 2 Preparations1.3 Overview of Installation and RemovalInstall/remove components by using the following procedure.Installing/removing internal components except for hard disk drives, fan unit, and power supply unit should bedone after dismounting the server from the rack.CAUTIONBe sure to observe the following precautions to use the server safely. Failure toobserve the precautions may cause burns, injury, and property damage. Fordetails, see Safety Precautions and Regulatory Notices.• Do not drop the server• Do not leave the server pulled out of the rack• Replace the cover after installing components• Beware of high temperatures• Do not get your fingers caught when installing components1. If the server is mounted on a rack, use the UID switch to identify the target server.See Chapter 2 (1.4 Confirming Servers (UID Switch)).2. Remove Front Bezel.See Chapter 2 (1.5 Removing Front Bezel).3. If the server is ON, turn it off.See Chapter 3 (6. Turning Off the Server).4. Disconnect the power cord from the outlet and the server.Important • After disconnecting the power cord from the server, wait for at least 30seconds before continuing to work because the components such ascooling fan on the motherboard might still be operating for about 30seconds even after the power cord was disconnected.• Make sure the AC POWER LED on power supply unit is unlit.5. If you want to install hard disk drives only, go to step 14. If not, pull out the server from the rack and put iton a flat rigid desk. See Chapter 2 (2.1 Installation) for details.Important Do not leave the server being pulled out from the rack.6. Remove Top Cover.See Chapter 2 (1.6 Removing Top Cover).7. Remove Support Bar.See Chapter 2 (1.7 Removing Support Bar).8. Remove Air Duct.See Chapter 2 (1.8 Removing Support BarAir Duct).
