I just purchased my box and it worked fine for a day. Now, nothing works except the "power-off" button. The only way to power back on is by unplugging the device, plugging back in, then using the button to power-on. Still, I do not get the blue light and system setup/config screen...just snow on my t.v. And none of the buttons on the remote work (except power-off). Any suggestions or remedies?