178
Upgrade and Maintenance Manual
BX920
S4
Main memory
©
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
1-
00
1.
fm
8.4
Replacing memory modules
8.4.1
Required tools
●
Preliminary and concluding steps: tool-less
●
Replacing memory modules: tool-less
8.4.2
Preliminary steps
Before replacing a memory module, 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 defective server blade as described in section
defective server blade" on page 45
Ê
Shut down the defective server blade as described in section
Ê
Remove the server blade from the system unit as described in section
"Removing the server blade from the system unit" on page 55
Ê
Open the server blade as described in section
Ê
If applicable, remove the air cowls as described in section
.
Upgrade and Repair Units (URU)
average hardware task duration: 15 minutes
Average software task duration: 5 minutes