System-Board Jumpers - IBM IntelliStation M Pro 6218 Problem Determination And Service Manual

System-board jumpers

Figure 6 shows the jumper blocks on the system board.
IEEE 1394 ( FireWire )
enable / disable jumper
Figure 6. System-board jumpers
Any jumper blocks on the system board that are not shown in the illustration are
reserved.
Jumper
Boot block (J1)
Clear CMOS (JBAT1)
IEEE 1394, Firewire (J1394)
(pins 1 and 2))
Default Disable
3 2 1 3 2 1
v Normal (default): jumper on pins 1 and 2
v Boot block recovery: no jumper; see "Recovering from a BIOS update failure"
on page 55 for more information.
v Keep CMOS data (default): jumper on pins 1 and 2
v Clear CMOS data: jumper on pins 2 and 3 with power cords removed from the
computer; see "Erasing a lost or forgotten password (clearing CMOS)" on page
62 for more information.
v IEEE 1394 enabled (default): jumper on pins 1 and 2
v IEEE 1394 disabled: jumper on pins 2 and 3
Boot Block Jumper (J1)
Default Recover
(no jumper)
3 2 1 3 2 1
Settings
Clear CMOS Jumper (JBAT1)
Default Recover
3 2 1 3 2 1
Chapter 1. Introduction
9