How to rwgulate the white "noise"

[Kryten]

Hi Not sure this is in the correct category but anyways...

i got a 37' LCD from LG. My problem is that when i look at TV i gett nois when the screen is withe. Im using a scart from my satelite decoder, is there any way to regulate the withe level?

The noise only occurse when im using my sat decoder NOT when i look at DVD (also via scart).

The nois is a sound that (i would think ) is about 100 - 500 Hz and it dosen't matter if i mute the TV or not its always there (when all white or brigth colors)

can anyone advice me on what to do?

 

[Nigel Goodwin]

Presumably it's mechanical noise from the inverter or PSU - as it's at a low frequency it may be the PSU is 'hunting' and putting ripple on the output.

Unless it's particularly loud, it may be 'normal' and within design limits.

 

[Kryten]

Well Nigel its quite loud. enough too "shout" over TV audio when i look at the TV and have a low volume on. And since its only when i use my Sat decoder i was thinking it might bee that the decoder puts out a withe signal thats too high.

 

[Nigel Goodwin]

Common problems are capacitors going high ESR, you may have some that have done just that - worth looking inside see if you can see any with bulging tops.

 

[Kryten]

Ok but is it the TV or is it the decoder? got any good guess?

 

[blueroomelectronics]

If your DVD is fine then it's probably the decoder.

 

[Kryten]

Hmm must chekc to see if i cant tune it in to correct signal levels