Home Theater Questions? Ask a Technician for Answers ASAP
Hello, The reason for this is the Yamaha ONLY produces sound when using HDMI , if the device has an HDMI "ARC" jack on it- which is the audio return channel. Your projector and most all other projectors, don't have this- TV's do. If you want the digital audio to return to the Yamaha then you need an HDMI audio extractor connected in line between the Yamaha's HDMI out and the projector. The extractor then gives you an optical output with which the sound will return to the receiver with.
If you need a link to that device, let me know and I will pull one up for you.
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The one at the link below is one I've used several times with good results. You'll also need a short HDMI cable and a short optical cable. The HDMI out on the Yamaha goes to "In" on the extractor, then "Out" on the extractor goes to the projector. Optical plugs into the extractor's audio out then connects to the Yamaha.
Before doing that, try one thing.
Scroll to page 70 of the manual at the link below, and in STEP 3, check and see what it shows the "Audio Output" is set to. Does it say AMP?
The Yamaha has a specific jacks that says "OPT" on it. You then need an optical cable- the extractor has the same jack. The cable is below:
Hi and welcome to JustAnswer,Thank you for the question and your patience. Should you still need assistance for information purposes only...Initially, a review / please confirm:
If still no sound, then it is no longer a setting issue but would point to a potential internal hardware concern particularly on the HDMI/digital audio processor.
The above posted extractor would then serve as a workaround and the extracted audio fed to the Yamaha's OPTICAL AV1 or AV4. An alternate propose approach though, connect the extractor between the computer and the Yamaha. And make do using analog audio connections for the DVD player (or Optical if available).
...or are you then considering a DIY (do-it-yourself) repair approach? If yes, do you have access to and familiar with a multi-meter and even a soldering iron?
Equally important, could you make use of the repair/Service Manual or at the very least, the schematic diagrams?