1, unable to start:

Check whether the light is on when charging, if not, check the power adapter and USB cable; Confirm OK, that is, there is something wrong with the pen. It is recommended to reset first. If it doesn't work, it needs to be repaired. Focus on the crystal oscillator

The light flashed and there was no sound.

Reset first. If it fails, the horn cable is broken or falls off.

3. There is sound, but clicking on it has no effect.

Reset first. If it is invalid, the camera is welded or damaged.

Most faults of the point reading pen can be eliminated by resetting and replacing the USB cable and power adapter. If the reset can't solve the problem, you can find a home appliance repairman. Local home appliance repairers can only repair simple faults (such as wire falling off and virtual welding), which is not to say that their technology is not good, but because they don't have maintenance information in this field.

If the components on the circuit board are broken, it is recommended to send them directly to the factory for repair, and it usually takes three to five working days to repair them.