Allied Telesis AT-8400 Series Reference Manual page 96

Installing or Replacing a Power Supply
82
Note
Always use the locking levers and the installation screw to secure
the power supply to the switch. Leaving the power supply partially
seated may cause the system to halt and subsequently crash.
6. Slide the power supply cover back into the chassis and secure the
cover by tightening the two captive screws.
Figure 49 Installing the Power Supply Cover
This completes the installation procedure for a power supply. For
directions on how to power on the unit, go to Chapter 6,
Powering on the Chassis
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on page 83.
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Cabling and