Lenovo THINKCENTRE 4485 - Manual (Page 85)

Locating parts on the system board
Figure 4 “System board parts locations” on page 77 shows the locations of the parts on the system board.
Figure 4. System board parts locations
1 4-pin power connector 15 eSATA connector
2 Microprocessor 16 Power fan connector
3 Microprocessor fan connector 17 Front panel connector (for connecting power switch and
LED indicators)
4 Memory slot 1 (DIMM1) 18 Front USB connector 1 (for connecting USB port 1and 2
on the front bezel)
5 Memory slot 2 (DIMM2) 19 Front USB connector 2 (for connecting additional USB
devices)
6 Memory slot 3 (DIMM3) 20 Serial (COM2) connector
7 Memory slot 4 (DIMM4) 21 Internal speaker connector
8 Thermal sensor connector 22 Front audio connector
9 24-pin power connector 23 PCI card slots (2)
10 Battery 24 PCI Express x1 card slot
11 Clear CMOS (Complementary Metal Oxide
Semiconductor) /Recovery jumper
25 PCI Express x16 graphics card slot
12 Parallel connector 26 System fan connector
13 SATA connectors 1 and 2 (SATA 3.0 connectors) 27 Cover presence switch connector (Intrusion switch
connector)
14 SATA connector 3 (SATA 2.0 connector) 28 PS/2 keyboard and mouse connector
Chapter 8 . Replacing FRUs (Machine Types: 4468, 4473, 4476, 4479, 4495, 4497, 4499, 4504, 4513, 4517, 4524,
7021, 7032, 7034, 7049, 7052, 7053, 7073, 7136, and 7178.) 77