| Power (Models 500 and 600)1 Ensure that the disk drive modules in the 7133 are no longer available to the usingsystem.2 Observe the Subsystem Power light 2. If the light is on: On Model 500, press the Power switch 1, and hold it pressed for twoseconds.| On Model 600, press and release the Power switch 2.The Subsystem Power light goes off.Back viewFront view3 Open the back cover if not already open (see “Covers” on page 3-2).Chapter 3. Removal and Replacement Procedures 3-15