Hello, the ways to turn off the ASUS AC86U panel light are as follows:

1. First, turn on the computer power, then press the power button and wait for the power light to go out;

2. Then, press the power button and wait for the power light to go out;

3. Next, press the "Mute" button on the panel and wait for the panel light to go out;

4. finally, press the power button and wait for the power light to go out to finish the operation of turning off the panel light.

I hope my answer can help you solve the problem.