Switches And Jumpers; Switches; Jumpers - IBM BladeCanter HS20 Installation And User Manual

Switches and jumpers

The following illustration shows the location of the switches and jumpers on the
system board.

Switches

Table 1 describes the function of each switch on switch block (SW2).
Table 1. Switch block (SW2)
Switch
number Default value
1 through 7 Off
8 Off

Jumpers

When the BIOS code page jumper (J12) is moved from pins 1 and 2 to pins 2 and
3, you can start the blade server from a backup BIOS page. The default position is
pins 1 and 2. See the blade server Hardware Maintenance Manual and
Troubleshooting Guide on the IBM BladeCenter Documentation CD for complete
details.
Note: If you start the blade server from the backup page because the primary
Switch block
(SW2)
Reserved
(SW3)
Switch
description
Reserved.
Power-on password override. Changing the position of this switch bypasses the
power-on password check the next time the blade server is turned on and starts the
Configuration/Setup Utility program so that you can change or delete the power-on
password. You do not need to move the switch back to the default position after the
password is overridden. See "Using passwords" on page 48 for additional
information about the power-on password.
BIOS page has become damaged, you need to flash the primary BIOS code.
BIOS code page
jumper (J12)
2-1
Normal
3 2 1
3-2
Backup
3 2 1
Light Path
Diagnostics
button
(SW4)
11
Chapter 1. Introduction