power issue on beaglebone black

hello everyone

i am facing a problem of on beaglebone black

  1. when i am supplying the external 5v power supply, the power led is on and in 2 minutes of time the board becomes very hot and it is not been able to access.
  2. when i am supplying power using usb ,the power led on a board blink and then power led is off and board does not boot.

so any one please help me with this issue

thanking advance
sumik chakka

The board is damaged. It is broken. I suggest you sent it in for repair. The processor is damaged.