The cause analysis and solution of the power supply light of notebook computer is not bright/flashing continuously

　The cause analysis and solution of the power supply light of notebook computer is not bright/flashing continuously

One, the power light is not bright

First of all, The notebook power light is not lit, there are two situations:

If the LEDs on the external power supply (adapter) on the laptop are not lit, the adapter may not be connected to the socket, or there is no power at the outlet, or the adapter may be broken.

If the power led on the notebook is not lit, it may be:

1, check whether the external adapter is properly connected with the notebook, the external adapter is working properly;

2, if only the battery as a power supply, check whether the battery model is the original battery, battery is full of electricity, battery installed is correct, etc.;

3, the elimination of the previous two cases, it may be the notebook motherboard power module problem, please check the DC board is normal;

4, if cannot find the question, the proposal takes to the specialized maintenance spot overhaul.

5, in addition, can also use the multimeter to detect the output voltage of the power box is normal, the laptop socket is loose, whether the switch has a role, or can be turned on but the light does not light, it may also be led aging.

Second, the power supply light has been flashing

1, if refers to the notebook external power (adapter) on the power indicator light flashing, then the adapter is usually caused by internal instability, at this time it is likely that the internal voltage instability, this situation is recommended that the notebook do not use the external power supply, the cause of this situation is mostly the power quality failure, For example, built-in rectifier large capacitance cracking or drum kits.

2, if the notebook is flashing the power indicator, it is possible that the notebook is in standby or dormant state will appear this situation, and many other laptops in the use of the process will not listen to flicker, belong to the normal situation.