Locating Parts On The System Board - Lenovo ThinkCentre M90 3244 User Manual

Locating parts on the system board

Figure 4 shows the locations of the parts on the system board.
Figure 4. System board parts locations
1 PCI card slot
2 PCI Express x16 graphics card slot
3 Internal speaker connector
4 Cover presence switch connector
(Intrusion switch connector)
5 Battery
6 Thermal sensor connector
7 Microprocessor fan connector
8 Microprocessor
9 4-pin power connector
10 Memory slot 2
11 Memory slot 1
12 Memory slot 4
13 Memory slot 3
14 Front panel connector
15 PS/2 keyboard and mouse connector
16 Serial (COM 2) connector
17 Front audio connector
18 24-pin power connector
19 Power fan connector
20 SATA connectors (2)
21 eSATA connector
22 Front USB connectors (2)
23 Clear CMOS (Complementary Metal
Oxide Semiconductor) /Recovery jumper
Chapter 1. Product overview
11