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I/O board internal connectors and jumpers
The following illustration shows the internal connectors and jumpers on the I/O
board.
Light path diagnostic
Front USB
Battery
Power-on password
override
Boot recovery
Wake-on-LAN
bypass
Media backplane
Remote Supervisor Adapter II SlimLine
SAS 1
SAS 2
SP serial (COM 2)
System serial (COM 1)
123
123
123
Default jumper
position
Table 2 describes the function of each three-pin jumper block.
Table 2. I/O board jumper blocks
Jumper name Description
Power-on password override (J9) The default position is pins 1 and 2. Change the position of this
jumper to pins 2 and 3 to bypass the power-on password check.
Changing the position of this jumper does not affect the
administrator password check if an administrator password is set. If
the administrator password is lost, the operator information panel
must be replaced.
For more information about passwords, see “Passwords” on page
62.
Boot recovery (BIOS) (J14) 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.
Wake on LAN
®
bypass (J15) 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.
16 IBM System x3950 Type 8878 and System x3950 E Type 8879: User’s Guide