How to check
You do all the measurements at your own risk: if you do not have the right skills or tools, please contact our customer service.
Connect the device to the USB connector and measure the voltage with a multimeter - the attached images show the correct location of the positive (red) and negative (black) probes of the multimeter. During the measurement process, be careful not to close the probe with any contacts, as this may also cause closure and damage to the device.
If the multimeter shows less than 4 volts, then a short circuit has occurred and the device is corrupted. If about 5 volts, the power supply of the device is working properly and the problem in this case can only be diagnosed in the service.