AP4050DN-HD
Hardware Installation and Maintenance Guide 4 Hardware Failures
Issue 01 (2016-04-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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4 Hardware Failures
About This Chapter
This section describes common methods for troubleshooting typical hardware faults.
4.1 A Device Fails to Be Powered On
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
The device is powered off.
The power cable is not securely
connected to the device.
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
The power sourcing equipment does not
support the PoE function or is faulty.
The power sourcing equipment is
incorrectly configured (the PoE function
is disabled or the power-off time range is
improperly set).
The line is faulty (the network cable or
distribution frame is damaged).
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