I/O Board; I/O Board Internal Connectors; Power Switch Bypass - IBM eserver xSeries 440 8687 Hardware Maintenance Manual

I/O board

This section illustrates the internal connectors on the I/O board, and provides
instructions for I/O board replacement.

I/O board internal connectors

The following illustration identifies the internal connectors on the I/O board. This
board supports the input and output ports located on the server.
SCSI B
connector (J38)
I/O VRM (J31)
Fan 4
connector (J21)
Fan 3
connector (J9)
Power/Reset
connector (J5)
Note: The default position for J4, J10, J20 and J28 is pins 1 and 2.

Power switch bypass

The power switch can by bypassed (force power on) using the J5 connector on the

I/O board.

Pin 1
Reset button
(0=pressed)
Unplug the J5 connector; then, either connect another power switch or connect pin
6 to pin 4 to simulate a button press.
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xSeries 440 Type 8687: Hardware Maintenance Manual
SCSI A Media bays
connector (J2) connector (J3)
Pin 2 Pin 3
Ground 3.3V standby
Pin 4 Pin 5 Pin 6
Power button Power LED Power/reset switch present
(0=pressed) (0=LED on) (0=present)
Riser card
connector (J44)
Boot recovery
(BIOS) (J28) Reserved (J4)
3 3
2 2
1 1
3 3
2 2
1 1
Reserved (J19)
Power-on
password (J20)
3 3
2 2
1 1
3 3
2 2
1 1
Fans 1 and 2
connectors (J8)
USB cable
connector (J1)