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Re: posting back about my problem
Thanks for providing the details
It sounds like the convergence settings for the TV may not be adjusted
properly.You should get the owners manual out and go to the convergence
which will have specific instructions on how to adjust convergence.
Convergence will need adjustment once in a while to compensate for
aging of the circuits and other changes.
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Fault to the main power supply regulator section. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. http://electro-medical.blogspot.com/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.
The power board has definitely failed. Sounds like a short that could be causing the cracklin sound. http://www.shopjimmy.com/sanken-3501q00201a-power-supply.htm I have ordered from this place before with fast shipping and no problems. Hope that helps.