System-Board Switches - IBM BladeCenter HS22V 7871 Problem Determination And Service Manual

System-board switches

Use this information to locate and define system-board switches in the blade
server.
The following illustration shows the location of the light path diagnostics switch
on the system board.
The following table describes the function of each switch in the switch blocks (SW1
and SW3).
Switch number
SW1 - 1
SW1 - 2
SW1 - 3
SW1 - 4
SW1
SW3
Description Switch setting
Password override Changing position of
switch this switch resets the
power on password.
Trusted Platform The default position is
Module (TPM) off.
physical presence
ICH10 RTC reset Normally open. Toggle
to reset RTC.
Boot using the backup The default position is
IMM code. off, allowing the blade
server to boot from the
primary IMM
firmware.
Definition
This switch overrides
the power on
password. The system
ships with this switch
off, but it can be on or
off in a functioning
system.
Turning this switch to
the on position
indicates a physical
presence to the TPM.
Resets the RTC. A
momentary toggle is
all that is required. To
avoid excessive battery
drain, do not leave this
switch closed.
When the switch is in
the default off
position, the blade
server will boot using
the primary IMM
firmware. When the
switch is on, the blade
server will boot using
a backup of the IMM
firmware.
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Chapter 2. Introduction