LG TV no picture

sounds like one of the Inverter transformers is bad or has a solder issue

Now tv turn on,pictures it flashes only a couple sec. than died have sound left only?Yes,than the tv power supply board,that the board where the tv power a/c cord plug into it.Board it might have dying and dead components parts that are called capacitors.Take the tv aparts.Inspect and check the tv power supply board carefully for dying and soon to be dead capacitors parts,these capacitors parts are alway bulges up or puffing up onto it tops.U have all the tools and know basic electronic also can do basic soldering work too?Yes,replaced all these dying capacitors parts are bulges or puffing up on to it tops capacitors parts with the same Micro Ferit and those capacitors voltages like 5 or 10 voltages higher the old capacitors components parts u replacing,now will solved this problems,also capacitors will last longer and have more heat resistance than before.If the tv power supply board check out and have none dying capacitors components parts that are dying and soon to be dead are bulging or puffing up on to it tops.Than the tv have those 2 long boards each of it sides that are called LCD inverter boards are dead,these 2 long LCD inverter boards only job are to provided the tv LCD screen panel a backlight to produced pictures.If u can't repair the power supply board by ur self,if the tv power supply require it.Tries websites like Shopjimmy.com,Ebay.com to buy a whole refrubish power supply board or those 2 long LCD inverter boards for the replacement.

sounds like week signal. try on another aerial and retune.

If you locate the audio board, check for dried up electrolytic capacitors and dry joints around the output IC itself.
That should fix your fault.

What does this noise sound like? IS it a kind of high-pitched noise or Hissing noise?

Ur high voltage is dying,the FBT,the flyback transformer is the prob.the big block of plastic with a red wire a with a cap hook to the CRT(crt tv).

Hissing noise and picture on and off means faulty flyback transformer, it has a small crack and voltage is leaking out, replace the flyback, if tv still not working replace horizontal output transistor (broken flyback could blow the transistor).

Turn on the Viewsat 2000 first and after 20 seconds, power on the Phillips42.

First a couple of questions:

1) What is the make and model please?

2) When the picture freezes, is it like a snapshot photo? or does the screen blank?

This sounds like an interruption in the digital data stream. If the picture remains on the screen, the "new" frame information is not being received nor processed. This can be as simple as a bad cable connection or noise on the digital information data lines.

Check to see if there is any pattern to when this occurs. For example, does it happen more frequently after the set has been on for a while? Try cooling down the set to see if temp effects the behavior.

Please update this and we'll work to resolve it.

Thanks,
Dan

sent it to be repair