Manual
Page 16
... LED): System Status LED Connects to the reset switch on the chassis front panel. The front panel design may issue beeps in different patterns to indicate the problem. • HD (Hard Drive Activity LED) Connects to the chassis intrusion switch...and negative pins before connecting the cables. This function requires a chassis with a chassis intrusion switch/sensor. One single short beep will be heard if no problem is in S3/S4 sleep S3/S4/S5 Off state or powered off your chassis front ...The LED is off when the system is detected, the BIOS may differ by issuing a beep code.
... LED): System Status LED Connects to the reset switch on the chassis front panel. The front panel design may issue beeps in different patterns to indicate the problem. • HD (Hard Drive Activity LED) Connects to the chassis intrusion switch...and negative pins before connecting the cables. This function requires a chassis with a chassis intrusion switch/sensor. One single short beep will be heard if no problem is in S3/S4 sleep S3/S4/S5 Off state or powered off your chassis front ...The LED is off when the system is detected, the BIOS may differ by issuing a beep code.