244
Upgrade and Maintenance Manual
BX920
S4
System board components
©
c
o
gn
ita
s.
G
e
se
lls
ch
ft fü
r T
ech
n
ik
-D
o
ku
m
en
ta
tio
n
m
b
H
2
0
14
Pf
a
d:
C
:\P
ro
g
ra
m
m
e
\F
C
T
\ti
m
_a
pp
\ti
m
_l
oca
l\w
or
k\PI
C
H
O
L\
O
B
J_
D
O
KU
-1
9
87
3-
00
1.
fm
10.5.2 Preliminary steps
Before replacing the system board, perform the following steps:
Ê
Disable BitLocker functionality as described in section
Ê
Disable boot watchdog functionality as described in section
watchdog functionality" on page 67
Ê
If applicable, open the rack door as described in section
.
Ê
Locate the desired server blade as described in section
defective server blade" on page 45
Ê
Shut down the server blade as described in section
.
Ê
If applicable, remove the HDD/SSD modules from the server blade, see
section
"Removing the 2.5-inch HDD/SSD module" on page 109
I
Ensure to take note of the HDD/SSD modules mounting positions for
reassembly.
Ê
Remove the server blade from the rack as described in section
the server blade from the system unit" on page 55
Ê
Open the server blade as described in section