The general power adapter indicator light only shows whether the power supply is working normally, if the blinking fault may have several reasons, may be caused by internal instability, at this time is likely to be unstable internal voltage. Or poor contact with the socket, it may also be that the external voltage is too high or too low, and it is more likely to be an external short circuit or external overload resulting in repetitive starting. Or the output is normal but the indicator is blinking, it may also be a problem with the display LED. These are the causes of blinking power adapter lights.
When troubleshooting, we first use a multimeter to check whether the socket is normal, whether the power supply voltage is 220V, the maximum is not more than 100 ~ 240V outside the range, if the mains voltage is abnormal, it is recommended to replace the use of environmental testing.
1.Use a multimeter to check whether the output voltage and current of the power adapter are consistent with those marked on the nameplate. If they are inconsistent and the mains voltage range is normal, the power adapter is faulty and needs to be replaced
2.If the above check is normal, if the power device is a laptop, we can remove the laptop battery and do not connect the external power adapter. Press and hold the notebook power switch for 5 seconds and repeat 3 times. After releasing the residual charge of the notebook, insert the power adapter separately and power up the test. If the electrical product is other, you can refer to this method.
3.If the fault persists, we need to check the DC interface to see if there is any damage, such as loosening or appearance damage. It is recommended to replace the DC head.
4.The internal failure of the power supply causes the hiccup phenomenon of the power adapter, mostly because the filter capacitor fails, and it can be replaced.
The power adapter indicator is off
5.The light on the power adapter is not bright, then it may be that the adapter is not connected to the socket, or there is no electricity at the socket, or it may be that the adapter is broken.
6.Check whether the external power adapter is correctly connected to the power receiving device, and whether the external power adapter works properly. If you can not find the problem, it is recommended to take to a professional maintenance point to repair or replace the power supply.
7.In addition, you can also use the multimeter to detect whether the output voltage of the power adapter is normal, whether the jack is loose, and re-power to see whether the fault can be eliminated, or whether all are normal but the light is not bright, so it may also be the aging of the indicator light.
The power adapter indicator light has been blinking, then it is usually caused by the internal instability of the adapter, at this time it is likely that the internal voltage is unstable, in this case it is recommended not to use the power adapter, the reason for this situation is the quality of the power supply failure, such as the built-in rectifier capacitor cracking or bulging.
