Firstly, make sure that whether the device has been recognized normally: right-click on My Computer-Manage-Device Manager-Sound, video and game Controller
Does the device named JA11 show? If not, it is possible that the device is damaged. Please contact support@fiio.com or your seller for help.
If JA11 can be recognized but not outputting normally, please try the following steps:
1. 3.5mm headphone with in-line remote control (TRRS) is connected to JA11:
When using on the computer with FiiO USB DAC driver , due to the limitation of the driver, headphone with in-line remote control is not compatible. Please check whether the in-line remote control headphone is connected? If yes, you could disable the in-line microphone function through the FiiO control app in your Android phone, and then you can reconnect JA11 to the computer use it normally.
2. 3.5mm headphone without in-line remote control (TRS) is connected to JA11: Please connect the headphone to the JA11 first. The headphone will be automatically recognized as 3pins headphone by the JA11, and then you can connect JA11 to the computer use it normally.
If the above methods fail to help, please contact support@fiio.com for help.