can't mount Beagle Bone Black -- connection lost

I’m not sure if this question is sent to the right class, but here goes.

Yesterday I made some scripts that store files on the microSD card as a simple base for communication between the host and the BBB. Today I can’t mount the BBB in anyway.

LEDs are on, I can reset, I can power down/up. But I can’t reach the microSD, nor can I ssh to BBB.

Connection is lost!

Anyone with a clue to get connection??