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HDMI audio appears only when turn monitor off and on

Joined
Mar 15, 2013
Messages
61
Motherboard
Intel NUC DC3217BY M 10.9
CPU
i3-7100
Graphics
HD4000
Mac
iMac
Classic Mac
LC, Performa
Hi, I have an issue where on a computer I am building for customer where HDMI audio on Mac Mojave portion works only if you turn monitor off and on (you do have to have it on during boot to select OS, then once in OSX, turn off and on again). Everything is ok on Windows.
Motherboard is unknown (XCY mini computer), video is built in HD Graphics 6200, cpu is Kaby Lake i3-7200U. Everything works OOB except built in audio.
 

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Joined
Mar 15, 2013
Messages
61
Motherboard
Intel NUC DC3217BY M 10.9
CPU
i3-7100
Graphics
HD4000
Mac
iMac
Classic Mac
LC, Performa
Could we now proceed to the part where you tell me how to fix that?

There is a line in bootlog, "1:798 0:000 No AudioIoProtocols, status=Not Found"

Could that be that?
 
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