User's Manual

4.1 A Device Fails to Be Powered On
Fault Description
The SYS indicator of a device is off.
Possible Causes
Power Supply Mode
Possible Cause
Power supply using a power module
l The device is powered off.
l The power cable is not securely
connected to the device.
l The power supply unit has failed.
– If the device connects to an external
power source, its power adapter may
fail.
– If the device has a built-in power
supply, the device itself may be
faulty.
PoE power supply
l The power sourcing equipment does not
support the PoE function or is faulty.
l The power sourcing equipment is
incorrectly configured (the PoE function
is disabled or the power-off time range is
improperly set).
l The line is faulty (the network cable or
distribution frame is damaged).
l The device is faulty.
AP2030DN
Hardware Installation and Maintenance Guide
4 Hardware Failures
Issue 05 (2016-07-22) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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