IBM iDataPlex dx320 6385, User Manual

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Removing a system-board tray from a 2U chassis
Attention: When two system-board trays are installed in the chassis, do not
operate the upper system-board tray with the bottom system-board tray removed or
powered off, except for servicing. When the bottom system-board tray is removed
or powered-off, chassis-level system management information is not read correctly.
For example, chassis fan speeds and temperatures might be returned as zero
values. In this situation, the unit will continue to operate normally, since the power
supply and fans are designed to operate independently.
Note: If two system-board trays are installed in the chassis, they can be removed
independently of each other.
To remove a system-board tray from the chassis, complete the following steps.
1. Read the safety information that begins on page v and “Installation guidelines”
on page 17.
2. Turn off the system-board tray and all attached devices (see “Turning off the
system-board tray” on page 15).
3. If external cables are connected to the front of the system-board tray, note
where they are connected; then, remove them.
4. Press in on the two release handles, pull the system-board tray out of the
chassis, and set it on a flat, static-protective surface.
Chapter 3. Installing optional devices
19