Locating Parts On The System Board - Lenovo ThinkCentre M77 Hardware Maintenance Manual

Locating parts on the system board

Figure 50 "System board part locations" on page 119 shows the locations of the parts on the system board.
Figure 50. System board part locations
1
Microprocessor
2
Microprocessor fan connector
3
Memory slot 1 (DIMM1)
4
Memory slot 2 (DIMM3)
5
Memory slot 3 (DIMM2)
6
Memory slot 4 (DIMM4)
7
Thermal sensor connector
8
24-pin power connector
9
Clear CMOS (Complementary Metal Oxide
Semiconductor) /Recovery jumper
10
Battery
11
Power fan connector
12
Parallel connector
13
SATA 3.0 connectors (4)
.
Chapter 9 Replacing FRUs (Machine Types: 1996, 1997, 2002, 2010, 2208, 2209, 2221, 2224, 2226, and 2227.)
14
Front panel connector (for connecting LED indicators and
power switch)
15
Front USB connector 1 (for connecting USB ports 1 and 2
on the front bezel)
16
Front USB connectors 2 and 3 (for connecting additional
USB devices)
17
Cover presence switch connector (Intrusion switch
connector)
18
Serial (COM2) connector
19
Internal speaker connector
20
Front audio connector
21
PCI card slot
22
PCI Express x1 card slots (2)
23
PCI Express x16 graphics card slot
24
System fan connector
25
PS/2 keyboard and mouse connector
26
4-pin power connector
119