I didn't come here to complain, more like get a sanity check, Because after weeks of troubleshooting, I'm completely baffled. Here's my setup: HR54 - in master bedroom C61K - living room to 4K TV C61K and/or C51K - in media room, currently to 1080p TV C41W - in kids' play area w/wireless bridge Shortly after original installation, I started experiencing dropouts on the C61K that is connected to a (soon to be upgraded) 1080p TV. I figured I wouldn't get much sympathy from DIRECTV, since I wasn't using the box as intended. So, I ordered a C51K for that 1080p in hopes of curing audio dropouts I experienced via HDMI and the digital coax output. C51K arrived, and dropouts continued. Here are the things I tried/replaced: New HDMI cables (tried several, actually), included brand new "certified" 18Gbps from Monoprice New coax cable from wall to box New power supply New RG-6 termination in room New RG-6 termination at home run location/splitter New splitter (the tech gave me a spare when he brought out the C51K) ^^^ Basically, I have tried everything! Coax cable is brand new Belden 1694A, that is also used for every other run in the house. Distance run from splitter is <30ft. And here is the crazy thing! If I remove the C61K/C51K, and replace it with the C41W... no dropouts! How can this be? And please don't recommend I just keep the C41K in that room permanently, it has a purpose and I want a hard-wired box where it is. So having a "working" C41K pretty much rules out an HDMI or receiver issue. The dropouts happen on all channels, and when they get bad, I lose the audio signal several times a minute. Typically the picture is not affected, but I have recently noticed a black screen that corresponds with the audio dropout. I am using the Dolby Digital setting, and if I change it to stereo, the audio still mutes, but my receiver doesn't always lose the "lock" on the stereo signal. I feel pretty confident that both C61K and C51K have latest software. In fact, the C61K was not hooked up for a few weeks, and when I reconnected it today, it took a new firmware download. Didn't impact the audio dropouts. I'm pretty good at troubleshooting almost everything, but I came here because I've tried every single thing I can think of and I'm at my wit's end.