Intergraph InterServe 800 SL System Reference Manual page 15

WARNING For stand-alone racks, ensure the rack's front and side stabilizers are extended at all
times.
To open the base unit:
1. Defeat the system's intruder alert. See System Setup for more information.
2. Log off and shut down the operating system.
3. If your system contains two 550 Watt power supplies, flip the circuit breaker switch to
the OFF position.
If your system contains a 300 Watt power supply, turn the keyswitch to OFF and remove
the AC power cord before performing any service operations. Systems configured with
the 300 Watt power supply do not have a circuit breaker.
4. If the base unit is in a rack and uses Intergraph sliding shelves, slide the unit out of the
rack.
WARNING For base units installed in a standalone rack, ensure the rack's front and side
stabilizers are extended at all times. If the rack includes adjustable feet on the
stabilizers, they must be in full contact with the floor. If the rack includes locking
casters, they should be locked.
Remove the screw (located under the sliding shelf handle) securing the sliding shelf
to the rack.
Disengage the sliding shelf by lifting the release lever.
Pull the shelf out until it locks in the extended position. The back of the base unit
should clear the front of the rack by two inches. You may need to disconnect cables
to fully extend the unit.
The base unit can remain on the shelf during the servicing or upgrade procedures.
5. Locate the twist locks on the back of the base unit. Turn the locks counter-clockwise to
disengage the side panels.
6. Pull the side panels back an inch then lift them off the unit. Figures on the following
page show internal views of the system.
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