Jumpers, Switches, And Buttons On Standard I/O Book Board - IBM System x3850 X6 Installation And Service Manual

Jumpers, switches, and buttons on standard I/O book board

This topic provides the location and information about the jumpers, switches, and
buttons on the standard I/O book board.
The following illustration shows the location of the switches, jumper, and button
on the server.
Note: If there is a clear protective sticker on the top of the switch block, you must
remove and discard it to access the switch.
SW2
switch
block
(reserved)
NMI
button
3
2
1
IMM security
jumper (J35)
The following table describes the jumper on the standard I/O book board.
Table 2. standard I/O book jumper
Jumper number
J35
Note: If no jumper is present, the server responds as if the pins are set to the default.
The following table describes the functions of the SW1 switch block on the
standard I/O book board.
1
2
SW1
3
4
switch
5
6
block
7
8
Jumper name
IMM security jumper
Chapter 1. The IBM System x3850 X6 and x3950 X6 Types 3837 and 3839 server
Jumper setting
v Pins 1 and 2: Removes the
security check, allowing
unsigned IMM firmware.
v Pins 2 and 3: (default)
Allows only signed IMM
firmware to be flashed.
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