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AS4021M-T2R+/4021M-82R+ User's Manual
3-3
Control Panel LEDs
The control panel located on the front of the SC745TQ-R800/SC745S2-R800 chas-
sis has six LEDs that provide you with critical information related to different parts
of the system. This section explains what each LED indicates when illuminated
and any corrective action you may need to take.
Power: Indicates power is being supplied to the system's power supply. This
LED should normally be on when the system is operating.
HDD: Indicates IDE channel activity. On the 4021M-T2R+/4021M-82R+, this
LED indicates SATA/SCSI drive activity when fl ashing.
1
NIC1: Indicates network activity on JLAN1 when fl ashing.
2
NIC2: Indicates network activity on JLAN2 when fl ashing.
Overheat/Fan Fail: When this LED fl ashes, it indicates a fan failure. When
on continuously it indicates an overheat condition, which may be caused by cables
obstructing the airfl ow in the system or the ambient room temperature being too
warm. Check the routing of the cables and make sure all fans are present and
operating normally. You should also check to make sure that the chassis covers
are installed. Finally, verify that the heatsinks are installed properly (see Chapter
5). This LED will remain fl ashing or on as long as the indicated condition exists.
3-2
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