12 Installation Guide4 Opening the Housing PanelsThe system housing has one front door and two side panels. Alwaysobserve the following ESD (electrostatic discharge) precautions beforeinstalling any system component:1. Do not remove any system component from its packaging unless youare ready to install it.2. Wear a wrist grounding strap before handling electronic components.Wrist grounding straps are available at most electronic componentstores.DO NOT attempt the procedures in the followingsections unless you are confident of yourcapability to perform them. Otherwise, ask aservice technician for assistance.4.1 Removing the Left and Right PanelMicroswitches are allocated on both side of the housing panel. They helpindicate whether the panel is removed or intact.To remove the left or right panel:1. Turn off the power to the system unit and unplug all cables.2. Place the system unit on a flat, steady surface and lock the wheels bypressing down the levers.3. Remove the screws of the left or right panel. Set the screws aside. Youwill need them when replacing the panels.4. Pull out the panel and detach.