The light of the power calculation board is not on

1. Try plugging it into another computer to see if the light is on? If everything works, or leave the light alone. If you mind, talk to the store, there should be three guarantees, exchange it. After all, there are flaws. Consumers have the right to do so, but maybe the boss is not willing to. Let's do it.

2. If the indicator light of the digital board is not on, it means that the digital board is not connected. Try changing the data line. If the problem still exists after changing the data line, it means that the digital board is broken. It is recommended to call 400 for repair

3. Check the contact problem, or check the driver, or plug it in and wait to see if it is on. Try another computer. Which digital board?

4. The indicator light of the
wiring board can be led beads connected in parallel with the socket, with a resistance of about 200K in front of the beads
if the indicator light is off, the resistance may be burned, but it does not affect the use of the socket

5. It is recommended to disconnect the USB cable from the digital board, and re plug the USB cable (plug the data cable into the digital board with a little effort). It is recommended to test it with another computer or with a USB interface; Replace a USB cable with the same Mini interface and test it; If it is determined that it is a proct hardware problem, send it to the test center for warranty. After connecting the digital board and the computer, make sure that the power light is always on

6. If you don't use it for 30 minutes, it will stop automatically from working state to resting state. As soon as you put the pen on it, it will light up. If you don't see if it is a setting problem or a driving problem

7. One is to see if there is false soldering. If not, check whether the current limiting resistance of the lamp is burnt out. If the indicator light is on, it indicates that the output voltage is normal. If the circuit of the indicator light has problems, it does not affect the normal output

8. Line 1 is not good
2 poor switch.

9. The damage of the step-down current limiting resistor in series with the indicator lamp is also an important reason for the indicator lamp not working.

10. Can it work? It can't be used. Go and have it repaired
please accept, thank you