IBM 71455DU manual Board internal connectors and jumpers, Jumper name Description

I/O board internal connectors and jumpers

The following illustration shows the internal connectors and jumpers on the I/O board.

	Remote Supervisor Adapter II SlimLine
SAS 1	Media backplane

SAS 2

System serial (COM 1)

SP serial (COM 2)

Light path diagnostic

Power-on password override

Boot recovery

Wake-on-LAN bypass

Front USB

Battery

1 2 3

	Default jumper
1 2 3	position
1 2 3

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.

16IBM System x3950 Type 8878 and System x3950 E Type 8879: User’s Guide