Lenovo 5457 Installation And Service Manual page 186

2. Turn off the server and peripheral devices and disconnect the power cords and all external cables (see
"Turning off the server" on page
3. Carefully turn the server on its side so that it is lying flat, with the cover facing up.
Attention: Do not allow the server to fall over.
4. Unscrew the two chassis screws on the rear side of the server.
5. Pull the rear side cover handle and push the front side cover handle at the same time.
Chassis screws
Figure 79. Side cover removal for 4U server model with non-hot-swap power supplies
Attention: For proper cooling and airflow, replace the server cover before you turn on the server.
6. If you are instructed to return the side cover, follow all packaging instructions, and use any packaging
materials for shipping that are supplied to you.
For the 5U server model with hot-swap power supplies, complete the following steps to remove the side
cover. For 4U server models with non-hot-swap power supplies, please see the above sub-section.
1. Read the safety information in
2. Turn off the server and peripheral devices and disconnect the power cords and all external cables (see
"Turning off the server" on page
3. Unlock the side cover; then, press the cover-release latch down (as shown in the illustration) to remove
the cover.
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174
23).
"Safety" on page v and
23).
"Installation guidelines" on page 31.