The causes and solutions of poor reading pens are as follows:

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.

2. The light flashes and there is no sound: reset first. If it does not work, the speaker cable breaks or falls off.

3. If there is sound, it doesn't matter if it is turned on: reset first, otherwise the camera is welded or damaged.

Matters needing attention in using point reading pen:

1. Don't let the stylus get wet: this will let water into the circuit board, which is a feature that any electronic product must pay attention to, and it will damage the lens of the camera. Once the camera lens sticks with dirt, it will greatly reduce the reading sensitivity of the point reading pen. In this case, the above problems can only be solved by replacing the camera.

2. Don't look at the TV screen: especially CRT TV, the TV screen has high-speed electronic scanning lines, which produces a strong sense of light at close range. If the camera of the point-reading pen leans against the TV screen, the high-intensity light will burn out the photosensitive IC of the camera, so parents should pay special attention when using it.