HDMI signal trouble
Until recently we were able to use HDMI cable and watch HD tv with no problem. All of a sudden while watching tv the screen split in two vertically. No idea what caused it. Every attempt to make it work has failed so far. Changed HDMI cable, power-started the Uverse receiver, nothing. We are using a coaxial cable in the meantime but the signal is not that crisp. We have one main receiver and one wireless. The problem is with the main receiver. No problem at all with the wireless one. Any ideas why the HDMI signal is failing? Thank you in advance for any help.