My friend gave me his old tivo. When I opened the box because I heard something rattling, I noticed the IR Control cable was disconnected. This is the cable coming from the IR sensor in the front to the mother board. I plugged it back in, powered on the tivo. The TiVo works fine, but i cannot get any response from the unit with the remote. The remote lights up and to test the remote, i programmed it to turn on and off my TV. It has brand new batteries. Its not a remote where you can switch tuners. On the front of the tivo, the red led doesnt display as if it were getting signal. I am thinking it has something to do with that cable.