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SC743 Chassis Manual
3-4
HDD:• Indicates IDE channel activity. SAS/SATA drive, SCSI drive, and/or DVD-
ROM drive activity when ashing.
NIC1:• Indicates network activity on GLAN1 when ashing.
NIC2:• Indicates network activity on GLAN2 when ashing.
Overheat/Fan Fail:• When this LED ashes it indicates a fan failure. When
continuously on (not ashing) it indicates an overheat condition, which may be
caused by cables obstructing the airow 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. This LED will remain ashing or on as long as the overheat
condition exists.