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System board layouts
The following illustrations show the connectors, LEDs, switches, and jumpers on the
system board. The illustrations in this document might differ slightly from your
hardware.
System board connectors
The following illustration shows the connectors on the system board.
System board jumpers and buttons
The following illustration shows the location of the BIOS recovery jumper and the
clear CMOS button on the system board.
The following table defines the function of each jumper and button on the system
board.
Battery
Video controller
SATA storage drive
Compression card
BIOS recovery jumper
Name
BIOS recovery jumper (J21)
Microprocessor
DIMM1
DIMM2
DIMM3
DIMM4
Clear CMOS button
Description
The BIOS recovery jumper (J21) can be opened or
closed. In the open position, the jumper is only
connected to one pin. To set the jumper to the
closed position, place the jumper on both pins.
v Open (default): Normal operation.
v Closed: Enables the BIOS recovery mode that
allows the BIOS firmware to be restored or
updated.
7
Chapter 1. Introduction
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