Uverse No Signal

I recently got a new tv stand so I unplugged the DVR box to put it inside the stand and when I plugged it back in it kept rebooting. It has been a day later and it still reboots with the gears screen and then goes to a no signal screen. The power light is green and the link light is green but the HD light that is usually blue is not on. I have restarted it and unplugged all the cables and I still have a no signal screen.