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   Compaq Professional Workstation AP550 Maintenance and Service Guide
Workstation Access Panel
To remove the workstation access panel (137384-001):
 1. Perform the steps in the “Service Preparations” section as previously shown.
CAUTION:
  Before removing the workstation access panel, ensure that the workstation is
turned off, all cables are disconnected from the back of the workstation, and the power cord is
disconnected from the grounded AC outlet
 2. Loosen the two thumbscrews that secure the workstation access panel to the workstation
chassis.
Figure 3-3.  Loosening the side workstation access panel thumbscrews