9-4 Upgrading Your WorkstationPREPARING FOR INSTALLATION AND REMOVALPrepare the installation or removal of a component depending on the following procedure:1. Shut down the OS.Or, press the POWER/SLEEP switch to turn off the power of the workstation. (ThePOWER/SLEEP lamp goes off.)2. Pull out the power cord from the AC inlet on the workstation and power receptacle.3. Remove all the cables connected to the workstation on the rear panel.POWER/SLEEP lampPOWER/SLEEP switch