Hi, Have had two converter boxes since...Feb 2009. In the last two months one stopped working entirely. The power comes on but it will not change from red (off) to green. Now the second one stopped receiving. It says on (green) I have checked and re checked all of the cables, changed antennas, plugged and unplugged and plugged again. Cannot figure out why they suddenly stopped working. changed channels from 2 to 3 to 4...checked the button on the back that says 3 or 4...and moved from room to room. no luck any ideas? Product is DT250A / Apex. Thanks!