Dell 2500 Removing and Installing a Power Supply

3. Loosen the two thumbscrews securing the cooling shroud to the system (see Figure6-6).
Figure 6-6. Removing and Installing the Cooling Shroud
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4. Rotate the cooling shroud up and lift to clear the rear cooling fan assembly and chassis (see Figure6-7).
Figure 6-7. Rotating the Cooling Shroud
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Installing the Cooling Shroud
1. Lower the cooling shroud into the chassis ensuring that the cooling shroud is aligned with the rear cooling fan assembly guides.
2. Rotate the cooling shroud down ensuring the thumbscrews are aligned with the connecting posts on the system board (see Figure6-6).
3. Tighten the two thumbscrews securing the cooling shroud to the system board.
4. Replace the system cover.
5. Close the front bezel.
Removing and Installing a Power Supply
1. Open the front bezel (see "Removing the Front Bezel" in "Troubleshooting Your System").
CAUTION: The power supplies are hot-pluggable. The system requires two power supplies to be installed for the system to operate normally.
The system is in the redundant mode when all three power supplies are installed. Remove and replace only one power supply at a time.