Lenovo ThinkVision E50 - Manual (Page 31)

The following illustration shows the locations of parts on the system board for
some computer models.
1 Microprocessor and heat sink 12 Front panel connector
2 Microprocessor fan connector 13 Front USB connectors (2)
3 Memory connector 1 14 Battery
4 Memory connector 2 15 PCI Express x1 adapter connector
5 Memory connector 3 16 Serial (COM2) connector
6 Memory connector 4 17 Front audio connector
7 Power connector 18 PCI adapter connectors
8 IDE connector 19 PCI Express x16 graphics adapter
connector (some models)
9 Diskette drive connector 20 System fan connector
10 SATA IDE connectors (4) 21 12v power connector
11 Clear CMOS/Recovery jumper
Chapter 1. Installing options 15