Lenovo ThinkCentre M70e Hardware Maintenance Manual (HMM) for ThinkCentre M70e - Page 78

Figure 4. System board part locations 1 Microprocessor 2 Microprocessor fan connector 3 Memory slots (2) 4 Thermal sensor connector 5 24-pin power connector 6 Parallel connector 7 Battery 8 Cover presence switch connector (Intrusion switch connector) (some models) 9 SATA connectors (3) 10 Clear CMOS (Complementary Metal Oxide Semiconductor) /Recovery jumper 11 Power fan connector 12 Front panel connector 13 USB connectors (2) 14 Serial (COM 2) connector 15 Front audio connector 16 Internal speaker connector 17 PCI card slots (2) 18 PCI Express x1 card slot 19 PCI Express x16 graphics card slot 20 System fan connector 21 4-pin power connector 22 PS/2 keyboard and mouse connector Locating internal drives Internal drives are devices that your computer uses to read and store data. You can add drives to your computer to increase storage capacity and enable your computer to read other types of media. Internal drives are installed in bays. In this manual, the bays are referred to as bay 1, bay 2, and so on. When installing or replacing an internal drive, it is important to note the type and size of the drive that you can install or replace in each bay and correctly connect the cables to the drive installed. Refer to the appropriate section in Chapter 8 "Replacing FRUs (Machine Types: 0806, 0810, 0821, 0823, 0827, 70 ThinkCentre Hardware Maintenance Manual