Lenovo 4221, 4220, 4222, 4215, 4219 Locating parts on the system board, Locating internal drives

Locating parts on the system board

Figure 4 shows the locations of the parts on the system board.

Figure 4. System board part locations
1 4-pin power connector	13 Front panel connector
2 Microprocessor	14 Clear CMOS (Complementary Metal Oxide
	Semiconductor) /Recovery jumper
3 Microprocessor fan connector	15 Front USB connectors (2)
4 DIMM 2	16 Front audio connector
5 DIMM 1	17 Internal speaker connector
6 DIMM 4	18 PCI card slots (2)
7 DIMM 3	19 PCI Express x1 card slot
8 Thermal sensor connector	20 PCI Express x16 graphics card slot
9 24-pin power connector	21 System fan connector
10 SATA connectors (3)	22 Cover presence switch connector (Intrusion
	switch connector)
11 eSATA connector	23 Battery
12 Power fan connector	24 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. Your computer comes with the following factory-installed drives:

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

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

vA 3.5-inch SATA hard disk drive in bay 5

Chapter 1. Product overview 11