1, this is the use of switching power supply power amplifier only unique fault. The load capacity of the switching power supply is generally poor, but it also has the short-circuit overload protection ability. When the load current is too large to exceed the adjustment range of the internal pulse width adjustment circuit of the switching power supply, the power supply will stop vibration and stop the output voltage.
2, your machine is due to the load of the switching circuit, the power amplifier circuit part of the abnormal, resulting in too much current to cause the switching power supply stop vibration, so the power indicator will light up when just started, the switching power supply, start and then slowly dim until the power supply stop vibration capacitor discharge process, the external power supply is maintained during the power supply will not start again.
3, the power amplifier circuit part of the current is generally too large power amplifier tube, integrated block and other power components caused by short circuit breakdown, of course, can not completely rule out the possibility of power components, find an experienced master repair it.
for the following reasons
1, first check whether the power adapter is good, there are some unqualified chargers, heat after charging, it is easy to burn the power adapter.
2, in the case of ensuring that there is no problem with the power adapter, it is likely that there is a problem on the circuit board inside the rod speaker. If it is in the warranty period, you can contact the manufacturer or brand to replace the new speaker or replace the new parts.
3, if the warranty period, you can go to the maintenance of electrical appliances to help you see, is the problem of poor line contact, or the circuit board has a problem, and then deal with it.
There are several possibilities for this one, plug it in and flash, and the lights go out. The internal power supply of the speaker is broken. It could be that the impact current breaks the rectifier tube and so on. Second, because of the impact of the impulse current, when the insurance is passed, the insurance is directly burned out, and the power is cut off. Three, the socket is not plugged in properly.
It could be the charging line, or the plug is in poor contact.