Table 3. FRU (CRU) categories
No.
FRU (CRU) category
1
Lower case
2
Battery pack
3
Speakers
4
Heat sink
5
M.2 solid-state drive (SSD)
6
Thermal pad for SSD
7
USB Type-C bracket
8
System board
9
Upper case (with touch pad)
10
I/O board cable
11
I/O board
12
Thermal pad for charger
13
WLAN card
14
Fans
24
Lenovo IdeaPad S540 series Hardware Maintenance Manual