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OK - update. The guy at Best Buy was great - totally understood the problem and we discussed possible solutions. He suggested reinstalling the sound card driver (Realtec HD), which I did, and it didn't help. It turns out that the HP Pavilion Elite (410y) has a quirk that's documented - if there's an external (well, not embedded) sound card it will disable the embedded Realtec sound card. Period. And it seems the Radeon RX 560 graphics card kinda looks like a sound card to the motherboard firmware, since it's capable of driving audio over HDMI (and DP too). So, adding another sound card is in order, unless I can find a way to disable the sound card features on the graphics card. Googling for advice now...
Sorry, there was a problem. Please try again later.Contact Best Buy, they're the ones who sold it to you. Also, you can go on-line to the Radeon web site and send them an E-mail. They should respond within 3 or 4 days. I'm not kidding. I contacted Best Buy and didn't get very far, then I sent an E-mail regarding an issue and they did respond in 3 or 4 days. It wasn't a big issue but nonetheless I was displeased with the slowness. I guess that's what I get for being a novice at this thing.
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