Seeduino ADK USB port dead

My Seeduino ADK board has stopped communicating with my application running on my phone. It worked fine but at some point it stopped connecting to my microbridge server running on the phone. I know the phone’s USB is fine because the PC can see it. I also know the Seeduino is fine as I can upload sketches to it and it runs them. However, when I upload a sketch using ADB to connect to my phone, nothing happens anymore which makes me thing the standard size USB port on the Seeduino has gone dead for some reason. How can I confirm this for sure ?

Hi there,
If you try to connect other phone , it also have the same problem?