Lenovo 4219, 4220, 4222, 4215, 4221 manual Locating internal drives

Figure 4. System board part locations

14-pin power connector

2Microprocessor

3Microprocessor fan connector

4DIMM 2

5DIMM 1

6DIMM 4

7DIMM 3

8Thermal sensor connector

924-pin power connector

10SATA connectors (3)

11eSATA connector

12Power fan connector

13Front panel connector

14Clear CMOS (Complementary Metal Oxide Semiconductor) /Recovery jumper

15Front USB connectors (2)

16Front audio connector

17Internal speaker connector

18PCI card slots (2)

19PCI Express x1 card slot

20PCI Express x16 graphics card slot

21System fan connector

22Cover presence switch connector (Intrusion switch connector)

23Battery

24PS/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. Your computer comes with the following factory-installed drives:

•A Serial Advanced Technology Attachment (SATA) optical drive in bay 1

•A 3.5-inch card reader in bay 3 (installed in some models)

•A 3.5-inch SATA hard disk drive in bay 5

72Hardware Maintenance Manual