5
Table of Mainboard Components
Label
Component
AGP1
Accelerated Graphics Port
(present on L4IBMG mainboard only)
ATX12V
Power connector
ATXPOWER
Standard 20-pin ATX power connector
BIOS_WP
BIOS flash protect jumper
BT1
Three volt realtime clock battery
CD_IN1
Primary CD-in connector
CD_IN2
Secondary CD-in connector
CLR_CMOS
Clear CMOS jumper
CNR1
Communications and Networking Riser slot
COM2
Onboard serial port header COM2
CPUFAN1
Cooling fan for CPU
CPU Socket
CPU socket (mPGA478)
DIMM1 ~ DIMM2
Two 184-pin DDR sockets
F_AUDIO
Front panel MIC/Speaker Out header
FDD1
Floppy disk drive connector
IDE1
Primary IDE channel
IDE2
Secondary IDE channel
IrDA
Infrared cable header
LAN_EN
Select onboard LAN
LED1
LED status indicator connector
LSJ1
Single color LED header
Modem_IN
Modem In connector
PANEL
Panel connector for case switches and LEDs
PCI1 ~ PCI3
Three 32-bit add-on card slots
PSW1
External Power switch
PWR_FAN
Power fan connector
SYS_FAN
Case fan connector 1
USB 3, 4
Connector for front panel USB ports
WOL
Wake On LAN wakeup connector
WOR
Wake On Ring wakeup connector
* Reserved for OEM use only
Note:
LED1 is usually connected to a light that in dicates that the computer is
powered on. Do not install hardware or disconnect power cables while the
LED is on.
This concludes Chapter 1. The next chapter explains how to install the main-
board.