Lenovo ThinkCentre M55e - Manual (Page 12)

Identifying parts on the system board
The following illustration shows the locations of parts on the system board.
1 Memory connector 1 10 Internal speaker connector
2 Memory connector 2 11 Diskette drive connector
3 SATA IDE connectors (2) 12 Front panel connector
4 BIOS WP 13 Power supply connector
5 Cover presence switch (Tamper
SW) connector
14 12v power connector
6 PCI riser connector 15 Microprocessor and heat sink
7 Battery 16 Fan connector 2
8 Clear CMOS/Recovery jumper 17 Fan connector 1
9 Temperature sensor connector
4 Hardware Replacement Guide