IBM B50 - Manual (Page 26)

System Board Jumper Settings
For a more complete description of the function of these jumpers, see "Installing and
Removing Options" in the RS/6000 7046 Model B50 User's Guide.
Jumper Description Settings
J15 Remote Power-up Default: Remote power-up disabled.
To enable Remote power-up, place
jumper on the two pins closest to the
rear of the server.
J20 Power-On Password Default: power-on password enabled
(can be set).
To disable the power-on password
(for instance, if it has been forgotten),
place jumper on the two rightmost
pins.
J32 Privileged-Access Password Default: disabled.
To enable the writing or changing of
the privileged-access password, place
jumper on the two pins closest to the
rear of the server.
J35, J36 SCSI Security Default: external SCSI enabled
To disable external SCSI connector,
move the jumper on J35 to the front
two pins, and the jumper on J36 to
the right two pins.
1-8 7046 Model B50 Service Guide