Replacing The Cover - Lenovo System x3250 M4 Installation And Service Manual

error code is displayed, indicating that an operating system was not found but the server is otherwise
working correctly.
To remove the server cover, complete the following steps.
Step 1. Read the safety information that begins in the begin of this documentation.
Step 2. Turn off the server and peripheral devices and disconnect the power cords and all external cables,
if necessary.
Step 3. If the server has been installed in a rack, loosen the two thumbscrews on the front of the server and
remove the server out of the rack enclosure; then, place it on a flat, static-protective surface.
Note: When you disconnect the power source from the server, you lose the ability to view the LEDs
because the LEDs are not lit when the power source is removed. Before you disconnect the power
source, make a note of which LEDs are lit, including the LEDs that are lit on the front panel, on
the rear panel, and LEDs inside the server on the system board, then, see this documentation for
information about how to solve the problem.
Step 4. Press down firmly on the blue tab on the top of the cover (on the right side near the front of the
server) and slide the cover toward the rear of the server until the cover has disengaged from
the chassis.
Cover-release
button
Figure 32. Cover removal
Step 5. Lift the 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.
Make sure that all cables, adapters, and other server 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.
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Lenovo System x3250 M4 Installation and Service Guide