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System-board jumpers

Use this information to locate the system-board jumpers.

The following illustration shows the locations of the jumpers on the system board.


Graphic illustrating system board jumpers

The following table describes the function of each jumper on the system board.

Table 1. System-board jumpers.

Jumper nameDescription
IMM2 debug serial port enable (CN42)Two-pin header. If a jumper is installed, the serial I/O port is sent to the IMM2. If a jumper is not installed, the serial I/O port is sent to the front serial port.
Low security (CN45)Three-pin jumper block for debug only. The default position are pins 2 and 3.
Power permission (CN47)Two-pin jumper block. The default is no jumper. Place a jumper on pins 1 and 2 to force power permission from the IMM2 to the real time management module (RTMM).
Trusted Platform Module (TPM) physical presence (CN51)Two-pin jumper. The default is no jumper. Place a jumper on pins 1 and 2 to indicate a physical presence to the IMM2 TPM chip.