IBM LS20 - BladeCenter - 8850, Service Manual

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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.
DIMM 1 (J31)
DIMM 3 (J4)
DIMM 2 (J30)
DIMM 4 (J2)
Microprocessor 1
and heat sink
Microprocessor
socket 2 and
heat sink filler
Battery (BH1)
Control panel
connector
SCSI connector 1
(J12)
SCSI connector 0
(J11)
I/O expansion option
connector (J13) I/O expansion option
connector (J10)
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.
4
4
2
2
3
3
1
1
Normal
operation
Start from
backup
BIOS image
4
4
2
2
3
3
1
1
Normal
operation
Disable WOL
BIOS backup page (J16) WOL bypass (J15)
Chapter 1. Introduction
7