Lenovo ThinkPad Edge E431 Hardware Maintenance Manual - Page 59

Table 9. Major FRUs and CRUs, FRU description, Self-service CRU, Optional-service CRU - keyboard

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Table 9. Major FRUs and CRUs No. FRU description 1 LCD unit 2 Power button board 3 Keyboard bezel assembly with touch pad (with fingerprint reader on some models) 4 Backup battery 5 Wireless WAN card 5 M.2 solid-state drive 6 Wireless LAN card 7 Battery pack 8 Lenovo OneLink connector cover 9 DC-in bracket and DC-in support bracket 10 DC-in connector with RJ45 sub card 11 Optical drive or blank bezel 12 Card reader with USB connector sub card 13 Small bottom cover 14 Large bottom cover 15 Hard disk drive with bracket or solid-state drive with bracket 16 Speaker assembly 17 Base cover assembly 18 Microprocessor 19 Memory module 20 System board assembly 21 Thermal fan assembly 22 Keyboard 23 TrackPoint cap Self-service CRU No No No Yes No No No Yes Yes No No Yes No Yes Yes Yes No No No Yes No No No Yes Optional-service CRU No No No No Yes No Yes No No No No No No No No No No No No No No No Yes No Chapter 7. Locations 53

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Table 9. Major FRUs and CRUs
No.
FRU description
Self-service CRU
Optional-service CRU
1
LCD unit
No
No
2
Power button board
No
No
3
Keyboard bezel assembly with touch pad (with
fingerprint reader on some models)
No
No
4
Backup battery
Yes
No
5
Wireless WAN card
No
Yes
5
M.2 solid-state drive
No
No
6
Wireless LAN card
No
Yes
7
Battery pack
Yes
No
8
Lenovo OneLink connector cover
Yes
No
9
DC-in bracket and DC-in support bracket
No
No
10
DC-in connector with RJ45 sub card
No
No
11
Optical drive or blank bezel
Yes
No
12
Card reader with USB connector sub card
No
No
13
Small bottom cover
Yes
No
14
Large bottom cover
Yes
No
15
Hard disk drive with bracket or solid-state drive
with bracket
Yes
No
16
Speaker assembly
No
No
17
Base cover assembly
No
No
18
Microprocessor
No
No
19
Memory module
Yes
No
20
System board assembly
No
No
21
Thermal fan assembly
No
No
22
Keyboard
No
Yes
23
TrackPoint cap
Yes
No
Chapter 7
.
Locations
53