Lenovo 7749, 7721 Locating parts on the system board, Removing and reinstalling the front bezel

Locating parts on the system board

Figure 5 shows the location of the parts on the system board.

Figure 5. System board parts locations
1 Microprocessor	12 Front panel connector
2 Microprocessor fan connector	13 Front USB connectors (2)
3 Memory slots (2)	14 Serial (COM 2) connector
4 Thermal sensor connector	15 Front audio connector
5 Diskette drive connector	16 Internal speaker connector
6 24-pin power connector	17 PCI adapter card slots (2)
7 Battery	18 PCI Express x1 adapter card slot
8 Cover presence (Intrusion) switch	19 PCI Express x16 graphics adapter card slot
connector
9 SATA connectors (4)	20 System fan connector
10 Clear CMOS (Complementary	21 4-pin power connector
Metal Oxide Semiconductor)/Recovery
jumper
11 Power fan connector

Removing and reinstalling the front bezel

This section provides instructions on how to remove and reinstall the front bezel.

To remove and reinstall the front bezel:

1.Remove the computer cover. See “Removing the computer cover” on page 86.

Chapter 8. Replacing FRUs - Tamdhu computers 89