Lenovo 33472YU, S230U manual Description, Self-service CRU, Optional-service

No	Description	Self-service CRU	Optional-service
			CRU
	Hard disk drive or solid-state drive slot cover	Yes	No
7
	Hard disk drive or solid-state drive	Yes	No
8
	Battery pack	No	No
9
	Proximity sensors	No	No
10
	Hard disk drive connector	No	No
11
	System board	No	No
12
	PCI Express Mini card for wireless LAN	No	Yes
13
	mSATA solid-state drive (on some models)	No	No
14
	PCI Express Mini card for wireless WAN (on some	No	Yes
15
	models)
	Backup battery	No	No
16
	Keyboard	Yes	No
17
	TrackPoint cap	Yes	No
18

Chapter 7. Locations 49