Sony KP-51HW40 51" Rear Projection Television Logo

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Posted on Oct 30, 2007

TV not working

Tv came on tonight when I turned on the power. Picture only covered 3/4 of the screen, from top to bottom. Sound was great. The tv turned itself off after a few minutes, the trouble light kept blinking "7" times. I downloaded the repair manual, so I will look the codes for you tomorrow, if that works for you. Bill

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  • Contributor 39 Answers
  • Posted on Dec 14, 2007
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Joined: Dec 06, 2007
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Vertical amplifier s faulty.Replace and resolder surrounding area.

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How to repair LG LCD TV 47LG70-UA no picture or sound

Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
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In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.
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Horizontal lines and no picture or sound after approx. 5 minutes

Good day!!!!


That problem is usually cause of faulty capacitors on the power supply board..

Just follow this instruction to fix your TV..

1. Open the back cover of your TV.
2. Look at the power supply board..Its normally connected to the power cord..
3. After that,,try to look at the actual image of capacitors if it is bulged on the top so that you can easily determine the bad capacitors..
4. After that,,try to replaced the bad capacitors using soldering iron and soldering lead..replaced the capacitors only with the same type ratings and value..
5. Some of the capacitors not bulged so its better if have a capacitance meter
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make sure your speaker to your sheron sound isnt to close to it .also if dvd player is the source then move away from tv will demagnatize the tv theres a magnet in them
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Light blinks 8 times

Best Solution by Guest worked!!! Great job and Thank you!
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