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– Optional-service CRUs: These CRUs are isolated parts within the computer that are concealed by an access
panel that is typically secured by more than two screws. Once the access panel is removed, the specific
CRU is visible.
Major FRUs and CRUs
Table 3. Major FRUs and CRUs
No.
FRU description
1
LCD unit
2
Keyboard bezel assembly with keyboard
3
Fingerprint reader assembly
4
9
Hall sensors
5
Thermal Module assembly
6
I/O board
7
Media card reader board
8
Hard disk drive or solid-state drive
10
Battery pack
11
Base cover
20
19
18
17
16
15
14
13
12
11
1
2
3
4
5
6
7
8
9
10
CRU ID
N
N
N
N
N
N
N
N
N
N
.
Chapter 6
Locations
35
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