Beagle bone black does not power up

I was using a new Beagle bon e black device and able to bootup.
I was able to see the uart logs using console.
I was trying to boot the device via UART.
As part of this tried to press S2 and Power button, then the device has stopped working.
Now even the power led is not glowing. Can you please support.

Make sure your power supply and cable are working, test them on something known working. Try that first then we can look at other options.