Hardware Failures; A Device Fails To Be Powered On - Huawei AP7052DN Hardware Installation And Maintenance Manual

AP7052DN&AP7152DN
Hardware Installation and Maintenance Guide
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 indicator of a device is off.
Possible Causes
Power Supply Mode
Power supply using a power module
PoE power supply
Issue 01 (2017-12-29)
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Hardware Failures

Possible Cause

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.
 The power sourcing equipment does not
support the PoE function or is faulty.
 The power sourcing equipment does not
support the required power supply mode.
 The power sourcing equipment does not
provide sufficient power.
 The power sourcing equipment is
incorrectly configured (the PoE function
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