Xianke square dance Xiao speaker maintenance

Hello! The small speaker won't open and the battery isn't broken. Your description can't find the problem immediately. I'm a home appliance repairman. I'll tell you the steps of inspection. First of all, if you have a multimeter, you can choose the voltage range to measure the power supply. If the voltage is normal, turn on the test button. If the switch is good, measure the power IC, usually 7805 or 7809 or 78 12. Depending on your input voltage of several V, test the 1 and 3 pins with a black pen in the voltage range on the middle pin. If the voltage is normal, test the current limiting resistance. Generally, the horn is not bad and can withstand several times the total power. If you haven't found the reason or done it badly, please send it to a repair shop for repair. The estimated cost is about 10-50 yuan (because I don't know the size of your stereo). I hope the above answers can help you.