Huawei ETS2251, User Manual

Page: 73 / 79

HUAWEI
65
13
Troubleshooting
The display screen keeps OFF after the FWT is turned on (no external
power adapter is connected with the FWT).
1 Open the battery case to check whether the battery is installed.
2 If the battery has been installed, it means that the voltage of the battery
becomes weak. In this case, you need to power on the FWT with a power
adapter.
The display screen keeps OFF after the FWT is turned on (an external
power adapter is connected with the FWT).
1 It is likely that the voltage output by the power adapter can not meet the
requirement of the FWT. In this case, you need to check whether the AC input
is normal, and whether the power adapter is the one accompanying the FWT.
2 It is also likely that the external voltage of the power adapter is lower or
unstable, thus causing the case that the FWT can not operate normally. In this
case, you need to check whether the external voltage of the power adapter is
normal, or power on the FWT with a battery.
There is no signal indicator on the screen of the FWT.
1 Check whether the antenna has been installed properly.
2 If there is still no signal indicator, please contact the carrier to check whether
the signal covers the area of the FWT.
There is no time indicator on the screen of the FWT.
1 Check whether the antenna has been installed properly.
2 Adjust the antenna of the FWT or move the FWT to the location where the
signal can be received easily.
3 If there is still no time indicator, please contact the carrier to check whether
the signal covers the area of the FWT.