User manual

17 Chapter 3 Operation
3.1.1 Switch, Button and I/O Interfaces
Momentary Power switch: Press this switch to turn the system power on
or off. Please use system shutdown or press this switch for few seconds to
turn off the system ATX power.
System Reset button: Press this button to reboot the system.
Alarm Reset button: Whenever a fault occurs in the system (e.g., fan
failure or the chassis is overheated), the audible alarm will be activated.
Pressing this button will stop the alarm from beeping.
9-pin D-SUB openings: For connecting COM port devices.
Dual USB ports: For connecting a wide range of USB devices for data
transfer, backup or input.
3.1.2 LED Indicators for System Status
Six LEDs are placed on the left side of the front panel to indicate system
health and activity. Please refer to Table 3.1 for the LED definition sum-
mary.
Table 3.1: LED indicator functions
LED Description Green Red
Power
System power Normal Abnormal
Fan
Cooling fan status Normal Abnormal
Temperature
Temperature in the chassis Normal Abnormal
Hard Disk
Hard disk drive activity Data access No light
LAN LAN1 & LAN2 status Normal
No light
Data transmit through LAN Blinking