IBM 8685 Hardware Maintenance Manual - Page 58

Notes, Before changing any switch settings or moving any jumpers, turn off the server

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Page 58 highlights

Table 6 describes the function of each switch on the switch block. Table 6. Switches 1-8 Switch Default value number 7 to 8 Off 6 Off Switch description Reserved. Power-on password override. Changing the position of this switch bypasses the power-on password check if the switch setting has been changed since the server was last powered on. You do not need to move the switch back to the default position after the password is overridden. Changing the position of this switch does not affect the administrator password check if an administrator password is set. 1 to 5 Off See "Power-on password" on page 16 for additional information about the power-on password. Reserved. The following illustration shows the location of the flash ROM page-swap jumper (J50) on the system board. When this jumper is moved to the non-default position, it recovers the server BIOS code (see "Recovering the BIOS code" on page 39). The default position is pins 1 and 2. Flash ROM page-swap jumper (J50) 3 2 1 Notes: 1. Before changing any switch settings or moving any jumpers, turn off the server; then, disconnect all power cords and external cables. 2. Any system-board switch or jumper blocks that are not shown in the illustrations in this book are reserved. 48 xSeries 255 Type 8685: Hardware Maintenance Manual and Troubleshooting Guide

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Table 6 describes the function of each switch on the switch block.
Table 6. Switches 1-8
Switch
number
Default value
Switch
description
7 to 8
Off
Reserved.
6
Off
Power-on password override. Changing the position of this switch bypasses the
power-on password check if the switch setting has been changed since the server
was last powered on. You do not need to move the switch back to the default position
after the password is overridden.
Changing the position of this switch does not affect the administrator password check
if an administrator password is set.
See “Power-on password” on page 16 for additional information about the power-on
password.
1 to 5
Off
Reserved.
The following illustration shows the location of the flash ROM page-swap jumper
(J50) on the system board. When this jumper is moved to the non-default position,
it recovers the server BIOS code (see “Recovering the BIOS code” on page 39).
The default position is pins 1 and 2.
Flash ROM page-swap
jumper (J50)
3
2
1
Notes:
1.
Before changing any switch settings or moving any jumpers, turn off the server;
then, disconnect all power cords and external cables.
2.
Any system-board switch or jumper blocks that are not shown in the illustrations
in this book are reserved.
48
xSeries 255 Type 8685: Hardware Maintenance Manual and Troubleshooting Guide