Lenovo ThinkCentre A57e - Manual (Page 17)

Identifying parts on the system board
Figure 4 shows the location of parts on the system board.
1 Thermal sensor connector 9 Front panel connector
2 4-pin power connector 10 Battery
3 Microprocessor and heat sink 11 Adapter card slot
4 Memory slot 12 Front USB connectors (2)
5 Diskette drive connector 13 Internal speaker connector
6 24-pin power connector 14 Front audio connector
7 SATA connectors (2) 15 Microprocessor fan connector
8 Clear CMOS/Recovery jumper 16 System fan assembly connector
Figure 4. System board parts locations
Chapter 2. Overview 9