CX2550/60/70 M4 Upgrade and Maintenance Manual 265
9 System board and components
This chapter provides information on how to replace the system board module
and system board components as its CMOS battery and the M.2 SSD.
Safety notes
V CAUTION!
● Devices and components inside the server remain hot after
shutdown. After shutting down the server, wait for hot components to
cool down before installing or removing internal options.
● Circuit boards and soldered parts of internal options are exposed and
can be damaged by static electricity. Always discharge static build-up
(e.g. by touching a grounded object) before handling electrostatic-
sensitive devices (ESDs).
● Do not touch the circuitry on boards or soldered parts. Hold circuit
boards by their metallic areas or edges.
● For further information, see chapter "Important information" on
page 33.
9.1 Replacing the CMOS battery
CMOS memory (volatile BIOS memory) and the real-time clock are powered by
a lithium coin cell (CMOS battery). This cell lasts up to ten years, depending on
ambient temperature and use.
If the CMOS battery is depleted or falls below minimum voltage levels, it need
to be replaced immediately.
Upgrade and Repair Unit
(URU)
Hardware: 5 minutes
Tools: tool-less; recommended: tooth pick
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