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.
R250D-E
Hardware Installation and Maintenance Guide
4 Hardware Failures
Issue 01 (2016-09-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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