What should I do if the LCD advertising machine has no sound?

After some companies bought theLCD advertising machine and went back to install it, they found that there was no sound and suspected that it was broken. In fact, it is not the case. The LCD advertising machine has no sound deterioration. We can first check whether the following problems exist.

First: Open the back cover of the LCD advertising player, and use a multimeter to measure whether the power amplifier on the driver board is powered on normally;

Second: If the power amplifier is powered on normally, the next step is to check whether the connecting wire of the speaker is normal;

Third: If the power amplifier of the driver board of the LCD advertising player is abnormal, replace the driver board; if the speaker is abnormal, replace the speaker.

In addition, if the connection line of the speaker of the general LCD advertising machine is not firmly connected, it is the easiest to fall off; if it falls off, then solder it with a soldering iron. Replace the driver board immediately. If you buy our company's LCD advertising machine, you can contact us directly, and the engineer will make a solution immediately after understanding the situation!