Wake on LAN
bypass (J31)
1
2
3
Password
override (J29)
1
2
3
1
2
3
Boot
recovery
(J22)
“I/O-board jumpers” on page 27 describes the function of each jumper block.
Table 9. I/O-board jumper blocks
Jumper name Description
Wake on LAN bypass (J31) The default position is pins 1 and 2. Move the jumper to pins 2 and 3 to
prevent a Wake on LAN packet from waking the system when the system
is in the powered-off state.
Password override (J29) When you change the position of this jumper, the server bypasses the
power-on password check. The next time you turn on the server, the Setup
Utility starts and you can change or delete the power-on password. You do
not need to move the jumper back to the default position (pins 1 and 2)
after the password is overridden.
Changing the position of this jumper does not affect the administrator
password check if an administrator password is set. If you forget the
administrator password, you must replace the I/O board. (Replacement of
the I/O board for this reason is not covered by the warranty.)
For more information about passwords, see “Passwords” on page 207.
Boot recovery (J22) The default position is pins 1 and 2 (to use the primary page during
startup). Move the jumper to pins 2 and 3 to use the secondary page
during startup.
28 IBM System x3850 X5 and x3950 X5 Types 7145, 7146, 7143, and 7191: Problem Determination and Service Guide
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