CEC

Why does HDMI drop out on my AV receiver?

Samsung 4K TV

Episode 1461

Tom from Pasadena, CA

Tom is having an issue with his Samsung 4K TV. The HDMI through his AV Receiver drops and he has to reacquire it. Leo says that it all comes down to his source. There's a feature called Consumer Electronics Control (CEC) that allows a streaming box to switch his AV Receiver automatically. It's annoying and happens to Leo all the time. So he should check his source in the AV Receiver. Then he should disable CEC everywhere. Samsung calls this feature "AnyNet Plus."

Why does enabling CEC on my HDTV prevent 7.1 Dolby Surround from working?

Vizio 70" HDTV

Episode 1454

Don from Arizona

Don has Vizio 70" HDTV running through a Sony 7.1 surround sound system, but when he enables the CEC functionality, it takes away the 7.1 Dolby surround. Leo says that CEC lets him turn on the Apple TV and lets it control the receiver. The problem is, results vary from TV to TV, so one TV may give him the center channel while the next doesn't. Leo advises turning off CEC and let the receiver handle it. It's more likely that the device isn't encoding it properly.

Why doesn't my TV switch to my laptop connection?

Episode 1241

Jeff from Ontario, CA

Jeff bought a Samsung Smart TV and it's connected to FIOS. Sometimes, though, they connect a laptop to it through HDMI. The TV doesn't like it and jumps back to HDMI 1, though. Leo says that is due to CEC or Consumer Electronics Control, which in theory will switch to the active device. In practice, it's sketchy at best. Some ports may be CEC and some may not be. And Samsung may not call it CEC. Jeff will also have to make sure that CEC is enabled. Another issue is a device going into sleep mode and not grabbing the CEC.