Static 'white' sound

Sounds like T'Con board fault. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Faults & possible causes to LCD screen are given with illustrations. You can get an idea about the fault to an extent.

If you have warranty left- replace it.

The time is the clue static in the background is electrical interference this can be caused by faulty electrical appliances UHF ham and CB Radios etc ask neighbours if and when they suffer this interference this will help to locate and identify the cause ie the closer you get the worse it'll be
Once you identify the source the culprit may decide to fix the appliance desist from operation or you can buy filters to eliminate the cause of static noise once you know the cause

Set the Channel scan for cable input, not antenna.

The color static, if we are talking about the same thing, is usually a digital signal interference. Check cables, and digital converter if used.

Chances are your main board is bad, its where all the sounds are producted, a new board should correct the issue, its something you can install yourself with a screw driver, have the set unplugged for about a day before replacing the board so all the capacitors are discharged..you can get a new board at shopjimmy.
TV Parts Universal TV Stands DLP Chips ShopJimmy

Sounds like a burn in, this is common when some still image is left on the tv screen for sometime, the only hope is to get to a white screen or static screen and let set for awhile, like the old days when you didn't have cable or any input and the tv just frowns.

Sounds like the issue is with the set top box of your cable or direct tv provider. Please swap that receiver for the equivalent or a more updated version.If the problem persists. Verify that all inputs on television is correct. It should match. Output of source( digital receiver,dvd player) to Input( television ). Make sure all is secure. Good luck

Dave you know your stuff man !!! You helped me fix my black line fix on my LCD / Plasma and then now you helped me get rid of my green dots on my screen !! You rock . thanks a Million

Many TV's with an LG plasma display (or built by LG for other manufacturers) have a manufacturing defect that has been reported widely on the Internet. LG, Akai, Samsung and Zeneth among others.

The sparkles are (usually red) visible on a black background with all inputs after the set has been used approximately one year. Soon after a pop is heard and the picture no longer shows at all.

LG and some other manufacturers using the LG displays have not acknowledged this defect and will only repair them free during the warranty.

Often techs will merely adjust voltages and or picture controls, which does not fix the problem but it just disguises it -- until the display blows -- usually after the warranty expiration.

I own a 42" Akai that is 9 months old that has recently been showing the red sparkles. My set is being replaced.

You should contact service if your set has this problem is under warranty and it should be replaced at no charge.

Good luck. :)