I have a Lite-On DD-A500GX and it’s connected to my TV with both an RF cable and an RCA cable.
I have the outside TV coax cable going into the DD-A500GX.
To access the DVD menu and record, etc. I switch the TV to AV mode.
When watching normal TV (in TV mode), there is no hum/buzz noise.
When watching and recording TV off the AV mode (DD-A500GX), I get a hum/buzz noise.
Both the DD-A500GX and TV are plugged into the same power outlet.
How can I remove this annoying sound?