Scientific Atlantic cable box no longer works with my CoStar
Up until last week everything worked great between my Vizio CoStar and my cable box. Everything integrated properly and worked well. Last week it just stopped working. I've tested both items separately and they work as they are suppose to. However, as soon as I connect the HDMI out from the cable box to the costar everything seems to lock up. Screen goes black, I can no longer use the costar remote to do anything and I'm just stuck.
Is there a new firmware update for the cable box perhaps?