Table 2. System board jumpers (continued)
Jumper number Jumper name Jumper setting
JP11 TPM initialization jumper
v Pins 1 and 2: Normal
(default).
v Pins 2 and 3: Initiate TPM.
JP12 IMM SPI half ROM enable
v Pins 1 and 2: Disabled .
v Pins 2 and 3: Enable IMM
SPI half ROM (default).
JP22 Low security_N jumper
v Pins 1 and 2: Normal
(default).
v Pins 2 and 3: Activate low
security.
Notes:
1. If no jumper is present, the server responds as if the pins are set to 1 and 2.
2. Changing the position of the boot block jumper from pins 1 and 2 to pins 2 and 3 before
the server is turned on alters which flash ROM page is loaded. Do not change the
jumper pin position after the server is turned on. This can cause an unpredictable
problem.
Important:
1. Before you change any switch settings or move any jumpers, turn off the server;
then, disconnect all power cords and external cables. Review the information in
vii, “Installation guidelines” on page 22, “Handling static-sensitive devices” on
page 23, and “Turning off the server” on page 15.
2. Any system-board switch or jumper blocks that are not shown in the illustrations
in this document are reserved.
System-board LEDs
The following illustration shows the light-emitting diodes (LEDs) on the system
board.
Microprocessor
DIMM 1 Slot
DIMM 2 Slot
DIMM 3 Slot
DIMM 4 Slot
IMM Hearbeat
LED
RTMM
Hearbeat LED
DIM 1 - 4
error LEDs
Microprocessor
error LED
System board
error LED
Standby Power
LED
Chapter 2. Installing optional devices 21
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