System-Board Layouts; System-Board Connectors; System-Board Jumpers - IBM LS20 - BladeCenter - 8850 Service Manual

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

The following illustration shows the jumpers on the system board.
Note: This server does not have a power-on password override jumper. See "Using
passwords" on page 87 for information about bypassing a power-on password.
BIOS backup page (J16)
I/O expansion option I/O expansion option
connector (J10) connector (J13)
SCSI connector 1
(J12)
SCSI connector 0
(J11)
1 2 Normal
operation
3
4
1 2
Start from
backup
3
4
BIOS image
Battery (BH1)
DIMM 1 (J31)
DIMM 2 (J30)
DIMM 3 (J4)
DIMM 4 (J2)
WOL bypass (J15)
3
Normal
4
operation
2 1
3
4
Disable WOL
2 1
Microprocessor 1
and heat sink
Microprocessor
socket 2 and
heat sink filler
Control panel
connector
Chapter 1. Introduction
7