System-Board Leds - Lenovo System x3100 M4 Installation And Service Manual

Table 3. System board jumpers (continued)
Jumper number
JP22
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.
3. If a message is shown indicating that your Trusted Platform Module's (TPM) physical presence is asserted, it is an
indication that the system is vulnerable to potential security risks. This occurs when the jumper setting of JP11 is
at Pins 2 and 3. Switching the jumper setting to Pins 1 and 2 of JP11 will deassert the Trusted Platform Module's
(TPM) physical presence.
Important:
1. Before you change any switch settings or move any jumpers, turn off the server. Review the information
in "Safety" on page
32, and "Turning off the server" on page
2. Any system-board switch or jumper block that is 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.
Note: The connectors on the system board illustrations might vary slightly from your system board,
depending on your server model.
IMM Hearbeat
LED
RTMM
Hearbeat LED
Figure 11. LEDs on system board
Jumper name
Low security N jumper
v, "Installation guidelines" on page
20.
Jumper setting
• Pins 1 and 2: Normal (default).
• Pins 2 and 3: Activate low security.
30, "Handling static-sensitive devices" on page
System board
error LED
Standby Power
LED
Microprocessor
error LED
DIMM 1 - 4
error LEDs
.
Chapter 2 Installing optional devices
29