[mythtv-users] Humming Noise coming from LCD tv

Philip Isaacs showcasefloyd at gmail.com
Wed Apr 2 14:39:50 UTC 2014


>
>
>> If it is a ground-loop issue, you can get a pair of inexpensive isolation
>> transformers (analog) from Radio Shack.
>>
>> Ground Loop Isolator 270-054 $20
>>
>>
>>
>> On 14-04-01 02:41 PM, Philip Isaacs wrote:
>>
>>>
>>>
>>
>>>
>>> To answer the some questions.
>>>
>>> My audio is built into the motherboard. It's an slightly older
>>> one (I can't remember the model)
>>>
>>> My TV is an LG and it does indeed have a both a separate
>>> *analog* audio input. And a separate one for digital audio
>>> input. But I've never set up an digital audio stuff before, so I
>>> don't know exactly what I would be doing. In fact I don't even
>>> know what type of cable to use for something like that.
>>>
>>>
>>> Floyd
>>>
>>>
>>
> I will chip in my $.02 and echo what a lot of others are saying.  If you
> have a way to do the audio digitally (either through your tv or a
> receiver), this is really the best bet.  I have dealt with ground loop hums
> in the past and tried many methods of rewiring, creating a ground, etc. to
> avoid.  The only method that worked reliably was to go all digital so no
> noise can be added to the signal.  If you live in an older house/apt or had
> shoddy electrical work done, it is hard to avoid ground loops with analog
> connections.
>


Well, it was a pretty simple fix after all. It did turn out to be a ground
loop. I plugged both my PC and TV into the same outlet (via  powerstrip)
and the HUM went away. Now if I can only figure out how to make my PC
quieter.

Floyd
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