System-board switches and jumpers
The following illustration shows the system-board switch block (SW1) and jumper
blocks (J28 and J42) on the system board.
System board
switch block (SW1)
1 2 3 4 5 6 7 8
OFF
1
2
3
1
2
3
3
2
1
3
2
1
1-2
Disabled
1-2
Normal
2-3
Enabled
2-3
Update
Boot block recovery
jumper (J28)
IXA adapter
jumper (J42)
Table 1 describes the function of each switch on the switch block.
Table 1. Switches 1-8
Switch
number
Default value
Switch
description
8
Off
400 MHz system board - Reserved. 533 MHz system board - Disable Wake on LAN
after ac power-on.
7
Off
Power-on override. When toggled to On, this switch forces the server to turn on,
overriding the power-on button.
6
Off
Power-on password override. Changing the position of this switch bypasses the
power-on password check the next time the server is turned on and starts the
Configuration/Setup Utility program so that you can change or delete the power-on
password. You do not need to move the switch back to the default position after the
password is overridden.
Changing the position of this switch does not affect the administrator password
check, if an administrator password is set.
See the
User’s Guide
on the IBM
xSeries Documentation
CD for additional
information about the power-on password.
5
Off
Reserved.
4
Off
Reserved.
3
Off
Reserved.
2
Off
Reserved.
6
IBM xSeries 235 Type 8671: Option Installation Guide
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