Audio buzz when using HDMI or COMPOSITE output

Owen

Photoshop Savant
Any time I plug an HDMI cable or a composite cable into the AF100 I get a very bad buzz on my audio. I have swapped mics, monitors and cables... basically everything but the camera itself. Even tried running the mic phantom vs. battery, with no change.

I'm feeling like the problem is within the camera, but I'm in the middle of a 20 day shoot and can't send the unit in for possible repair.

When I power down the external monitor the buzz goes away.

Wondering if anyone else has experienced this or has any suggestions.
 
What kind of monitor/ is it battery or line powered? The hum might be an AC hum. You may have a problem with the grounding of your monitor.
 
The monitors are AC powered. I used a ground to two prong adapter to test, but no change.

I will test with a battery powered monitor shortly.
 
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