While watching the TV the picture suddenly went out - still have sound. Turning the TV off and on again does not help - the POLAROID Logo displays, but when the station connects - still no picture

Your backlight inverter board is likely bad. If you're handy it is relatively easy to replace. Google for replacement part.
if you can see a picture while shining a flashlight on the screen then it is most likely the inverter board. Backlights provide the light through the lcd screen for brightness.

Hi Richard, The link below is a YouTube video showing how to fix a Samsung television NO picture GOOD sound, Also there's videos down the right side of the link that may help as well........CHEERS..
https://www.youtube.com/watch?v=Bf5T2wwtydY
LG No Picture Screen Flash 47LN5200 47LN5400 47LA6200 47LN5700 47LN5750...

Yes, it can be fixed but you have multiple problems. By the time you replace all that has to be you would be better off buying another disposable TV.

LCD TV Repair Tutorial - LCD TV Parts Overview, Common ...

? 11:05
https://www.youtube.com/watch?v=tS4sIpdajVw
Aug 23, 2013 - Uploaded by ShopJimmy.com
Repair review of common LCD TV Problems and Repair Solutions ... input the tv is set to it begins making a high pitched whiningsound. .... I have a LG 47LN5750 that powers on, flashes a good picture for about 1/2 second, then goes dark. ... hi my samsung tvis not turning on is black. and I just replace the ...

#Treat At Home high pitched whine from plasma tv Tinnitus ...

www.aspenridgerentals.com/tinnituscure/?...high%20pitched%20whine%...

LG 50PK540 plasma TV Repair power supply EAY60968801 Part 1-2 ... Sanyo DP42849 with high pitched squeal after replacing power supply. ... In my second daily fix video, I solve a mystery that was making me having to turn off my speakers before I went to be ... The flash is accompanied by an high pitched sound.

TV not turning on; making high-pitched sounds - Tom's ...

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/

you need to change the picture board/ the display board

Well, no sound no picture = power supply unit
Sound no picture= flyback
picture no sound =tuner/audio logic

You get my drift?

You power supply is bad you replace it you got another new TV, with this digital conversion hitting I would rather advise you to get a nice flat panel and donate that one to Goodwill


Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/edwy_1a56970cf1ea4620

stiv0's Support Profile at FixYa will give you detailed instructions for repairing your set

I also had this problem with the sound suddenly going out. After spending hours determining that it was not caused by my cable box, and unlocking volume codes and such, I took someone else's advice and hooked up a cheap surround sound speaker system through the audio ports on the back. Now I have sound for my tv, and it even sounds better than when the tv sound was working.