Beaglebone black power-up fail.

Hello

I bought beagle bone balck a few days ago (<= 1 week), decause my previous BBB doesn’t work suddenly. But the new one also got the same problem after using it for several days.

To be specific, when I plugged-in the 5V-2A adapter or mini-USB connector to the board, the power LED blinks one time for <= 1sec. Then the board doesn’t wake up.

Is it the hardware or software issue? And any suggestions to revive my boards?

Best regards

Heecheol yang.