TX1320 M4 Upgrade and Maintenance Manual 273
System board and components
14.2 CMOS battery
14.2.1 Replacing the CMOS battery
Safety notes
V CAUTION!
● The CMOS battery must be replaced with an identical battery or with
a battery type recommended by the manufacturer.
● Keep lithium batteries away from children.
● Do not throw batteries into the trash can. Lithium batteries must be
disposed of in accordance with local regulations concerning special
waste.
● For more information, see section "Environmental protection" on
page 44.
● Ensure to insert the CMOS battery with the positive pole facing
up!
14.2.1.1 Preliminary steps
Ê "Locating the defective server" on page 47
Ê "Shutting down the server" on page 49
Ê "Disconnecting the power cord" on page 50
Ê "Getting access to the component" on page 51
Ê Remove the corresponding HDD fan: "Fans" on page 163
Ê If applicable, disconnect the Oculink cables from the PCIe backplane.
Upgrade and Repair Unit
(URU)
Hardware: 5 minutes
Tools: tool-less; recommended: tooth pick
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