IBM Flex System x440 Compute Node Installation And Service Manual page 31

The following table describes the functions of the switches on switch block SW3.
Switch number Description
U52-1 Password override
U52-2 Trusted Platform
Module (TPM)
physical presence
U52-3 Real time clock (RTC)
reset
U52 and U9020
switch block
Switch setting
The default position
Open.
The default position is
Open.
The default position is
Open.
Definition
Changing this switch
to the Closed position
overrides the
power-on password.
Changing this switch
to the Closed position
indicates a physical
presence to the TPM.
Changing this switch
to the Closed position
resets the RTC. A
momentary toggle is
all that is required. To
avoid excessive CMOS
battery drain, do not
leave this switch in the
Closed position.
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Chapter 1. Introduction