Beaglebone wireless not recognized by the pc


I’m relatively new to the BBB. My BBB wireless suddenly lost connection to my PC. Both my Windows10 and Linux can’t see BBB connected to my PC as if nothing is connected (for example that’s what I found in device manager ). To put it in another way, BBB doesn’t appear as a USB drive and I can’t ssh to I’ve tried this on different PC, different OS and with different cables.

After I power it on via USB, the ‘Power’ light is on and USR0 is flashing. I guess the board is still working but it can’t talk to PC via USB?? Does anyone have any thought on this? Thanks!