whenever i have any kind of a problem like this i always try three
things first, in order ..

1) wrap the signal and power cables multiple turns around a ferrite
rod, then ...
2) if problem persists, try another (better) ground, then ...
3) if problem persists, re-route signal cables so they aren't following
beside other wires, especially a/c power wires or wires from electric
motors ...

then once i've satisfied those superstitions i try to actually figure
out what is going wrong, what the real trouble is .. lol

if i had to guess i'd say it's the inverter ...

b393capt wrote:
I am getting a humming sound in my boat TV, new installation, maybe
someone has solved this before.
[snip]

No Inverter is in use. The TV (thru a 12V to 18V converter) and the
DVD (natively) are connected to 12VDC. At the time, the boat was also
disconnected from shorepower.

Shut your battery charger off, see if it goes away.

"Capt John" wrote in message
ups.com...
Shut your battery charger off, see if it goes away.

Or the 12-18V converter, which also contains an HF switcher.

Meindert

The battery charger was not on (I was also disconnected from shore
power)

In one of my tests I did remove the 12V-18V converter which powers the
TV. When I plug the TV into shore power, everything works perfect.
Great
sound & picture.

Help ... don't forget me

Help ... don't forget me