System board jumpers, System, Board – Lenovo 6434 User Manual
Page 31: Jumpers
System
board
jumpers
The
following
illustration
shows
the
jumpers
on
the
system
board.
There
are
no
changeable
switches
on
the
system
board.
1
Boot
block
jumper
(JP6)
2
Clear
CMOS
jumper
(JP1)
3
Mini-BMC
force
update
jumper
(JP3)
The
following
table
describes
the
function
of
each
jumper
block.
Table
2.
System
board
jumper
blocks
Jumper
number
Jumper
name
Jumper
setting
JP1
Clear
CMOS
jumper
v
Pins
1
and
2:
Keep
CMOS
data
(default)
v
Pins
2
and
3:
Clear
the
CMOS
data,
which
clears
the
power-on
password.
Make
sure
that
the
ac
power
source
is
disconnected
from
the
server.
Note:
Changing
the
position
of
this
jumper
does
not
affect
the
administrator
password
check
if
an
administrator
password
is
set.
If
the
administrator
password
is
set
and
forgotten,
remove
and
then
reinstall
the
battery.
JP3
Mini-BMC
force
update
Pins
1
and
2:
Open
(default).
Note:
You
do
not
need
to
set
this
jumper
because
it
stays
at
this
setting.
Chapter
2.
Installing
optional
devices
17