Lenovo System x3550 M4 Installation And Service Manual page 209

Step 4. Pull up firmly on the blue latch on the top (in the center of the front of the server) of the cover and
slide the cover toward the rear of the server until the cover has disengaged from the chassis.
Figure 106. Cover removal
Step 5. Lift the server cover off the server and set it aside.
Attention: For proper cooling and airflow, replace the server cover before you turn on the server.
Replacing the cover
Use this information to replace the cover.
To replace the server cover, complete the following steps:
Step 1. Make sure that all cables, adapters, and other components are installed and seated correctly and
that you have not left loose tools or parts inside the server. Also, make sure that all internal cables
are correctly routed.
Important: Before you slide the cover forward, make sure that all the tabs on the front, rear, and
side of the cover engage the chassis correctly. If all the tabs do not engage the chassis correctly, it
will be very difficult to remove the cover later.
Step 2. Position the cover on top of the server.
Step 3. Slide the cover toward the front of the server.
Step 4. Make sure that the cover correctly engages all the inset tabs on the server.
Step 5. Press down the blue latch on the top (in the center of the front of the server) of the cover.
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Chapter 6 Removing and replacing components
195