• New Patreon Tier and Early Access Content available. If you would like to support AVForums, we now have a new Patreon Tier which gives you access to selected news, reviews and articles before they are available to the public. Read more.

Panasonic recorder HDMI sound muting


Standard Member
A strange and annoying problem – any advice/explanation?
My Panasonic DMR-BWT720EB is used via one of two HDMI inputs of an Asus MX279 LCD monitor. A PC is also used via the VGA input.
With the recorder operating, when the source input of the monitor is selected from HDMI to the PC via VGA for at least ~1 minute, on re-selecting the recorder HDMI input the sound becomes muted. Video is still OK.
Sound is restored if the recorder is powered down/up, or the HDMI link is physically disconnected/connected. Powering the monitor down/up has no effect.
Additional notes:
- The recorder analogue sound output is not affected
- If the selection away from HDMI is for < about 1 minute the sound is retained
- When the recorder ‘sees’ an HDMI source being accepted by the monitor then ‘HDMI’ appears briefly on the display panel, whether the sound becomes muted or not.
Is the recorder muting the sound, rather than the monitor muting the sound from its HDMI input?
Is some form of HDMI handshake involved?
Why is only the sound muted, and not also the video?

The latest video from AVForums

Fidelity in Motion's David Mackenzie talks about his work on disc encoding & the future of Blu-ray
Subscribe to our YouTube channel
Support AVForums with Patreon

Top Bottom