4. Issues regarding the E10K-TC's indicator light

1. After connecting to the computer, if the E10K-TC can work normally but the indicator light keeps off, the light is probably broken. 
2. After connecting to the computer, if the indicator light keeps flashing, it is suggested to unplug and plug the USB cable or restart the computer. If the problem still exists, it may be the issue of the E10K-TC.
3. Last but not least, it is suggested to disconnect and reconnect the E10K-TC after quitting the music app.