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Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis. http://electronicshelponline.blogspot.com/
Some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement.
This just happened to me as well. Keep it plugged in for about five minutes without trying to turn it on. Then try. This will ultimately tell you that your convergence chip is out. If the screen comes back on, it will look distorted. This is most definantly that chip going out. I suggest a tv repair kit or trash it. You can find a vs 45605 here:
http://www.tvrepairkits.com/xcart/vs-45605/
The first place to start is with the Main bd. The second cause would be the T-con bd. Have a trained Samsung tech troubleshoot to find out and repair the set.
Call 1-800-Samsung to set up a warranty service call. They will repair it in your home if they send a Samsung Field Engineer. You probably have a bad Main bd.
There are five capacitors on the power board which have dried out and need replacement. A reputable repair shop should be able to fix this for around $50.00 including labor.
All symptoms in your TV shows that you need to replace its Lamp as it has been consumed its life hours and TV requires new lamp. Lamp can be obtained from Sony Website. Price is $200, Hope this info will help you to enjoy your Sony TV in coming days.
This will need to be taken to a repair shop. You likely have either a bad solder connection that "opens up" when the set warms up, or a filter capacitor that is going bad. Depending on the picture quality and replacement value of the set, you may just want to replace it as the repair could run about $100 I would guess.
Its the Symphonic WF20L6 TV
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