MBWE (1TB) will not power up

The power connection on the back of my MBWE (1TB) WDHINC10000 accidentally came unplugged and I lost power.  I plugged it back in and held down the power button but it will not power up.  I tried unplugging and connecting to another outlet and still will not light up.  I am holding down the power button waiting for the led on the front to turn on but it does not, even after a whole minute.  Any help is appreciated.