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Our Visio 42" flat screen TV did the same thing. It didn't happen that often but sometimes it would go darker or the sound would go off until I changed the channel or turned TV Off then back On. I contacted Visio through my warranty and they sent me a flash drive to install info on my TV. Did not fix the problems. A year later before warranty ended I contacted Visio again. They sent a huge box for me to pack my TV in to send to the warehouse where they fix everything. It took about 2 wks. to get it back. Worked fine for about 4 months and the problems continued. I will not buy another Visio TV. I found out that they had many problems with several models.
Now the tv u turn on u have a flashes of a picture only few sec. and died have sound left only?Yes,than the 2 long boards call the LCD inverter boards are the causes and the problems.These 2 long LCD inverter boards help the LCD screen panel to have a backlight to produced a picture.Tries websites like Shopjimmy.com,Ebay.com to buy those 2 refurbishes long LCD inverter board for the replacement.
looks like ur screen is gone........or any other electrical problems are there.......call a service center and let it check out,,,,,,,a new screen is nearly $1000 so may a better idea to get a new tv if this is the cause
I have Sony KDL-32XBR9 and I have noticed a similar problem. When the picture is showing mostly black, for example during the ending credits of a movie, the TV will further darken the display. Once the picture lightens back up, the TV will adjust the brightness of the display back to normal. I just called Sony customer support and they indicated it was a firmware problem and they will be sending a USB device in the mail to update the firmware. Hope this helps.
It wouls appear one of the backlights in the screen is cutting out, this will require the screen to be replaced although in certain circumstances, depending on the age & model of your TV, it is sometimes possible to change the faulty backlight independantly. Take it to a repair centre to get an anaylisis of the type of screen it has.
The Panasonic call center helped us with this one. Our Closed Captioning had been turned on through the TV settings. This made us have a black box with everything besides our cable. Turning off CC on our TV Main Menu solved the problem for us.