System-Board Jumpers - IBM x3655 - System - 7985 User Manual

System-board jumpers

The following illustration shows the jumpers on the system board.
Any jumpers on the system board that are not shown in the illustration are
reserved. See the section about recovering the basic input/output system (BIOS)
code in the Problem Determination and Service Guide on the IBM Documentation
CD for information about using the BIOS recovery jumper.
Table 2 describes the function of each jumper on the system board.
Table 2. System Board Jumpers
Jumper number Description
J33 Wake on LAN: The default position is pins 1 and 2. Change the position of this jumper to pins 2
and 3 to prevent a Wake on LAN packet from waking the system when the system is in the
power-off state.
J35 BIOS recovery: The default position is pins 1 and 2 (use the primary page during startup).
Move the jumper to pins 2 and 3 to use the secondary page during startup.
J37 Power-on password: The default position is pins 1 and 2. Changing the position of this jumper
to pins 2 and 3 bypasses the power-on password check the next time the server is turned on
and starts the Configuration/Setup Utility so that you can change or delete the power-on
password.
Changing the position of this jumper does not affect the administrator password check if an
administrator password is set. It you forget the administrator password, you must replace the
system board.
For additional information about passwords, see "Passwords" on page 69.
Wake-on-LAN
(J33)
BIOS recovery (J35)
Power-on password
override (J37)
Chapter 2. Installing optional devices
21