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Supermicro SC747 Chassis User's Manual
2.4 I/O Ports
There are two USB 3.0 ports provided to the right of the control panel LEDs.
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Overheat/Fan Fail:
When this LED flashes it indicates a fan failure. When continuously on
(not flashing) it indicates an overheat condition, which may be caused by cables obstruct
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ing the airflow 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 flashing or on as long as the
overheat condition exists.
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Power Fail:
Indicates a power failure to the system's power supply units.