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Your LG Tv having a power IC problem, so you either report the problem to qualifying electriclal repairer to solve your TV problem. Though this will be helpful
Buying a new TV would save time most definitely, if it's in really bad shape the repair costs would add up pretty huge. Buying a broken TV with an intact screen might work as long as you can prove it's exporting signal though. If time means anything, and you have experience in engineering, I'd say go with buying a broken TV, otherwise based off your description, just buy a new system.
Projection TV sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the video to look normal. When its out of alignment the video will look 3D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the TV menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired. This is a very common failure on these projection sets and a fairly simple DIY fix. All projection sets including Samsung, RCA, Sony, Philip Magnavox, Panasonic, Pioneer, Akai, GE, JVC, Toshiba, and others at some point will have the same problem. You can get a repair kit with parts and instructions from www.TvRepairKits.com
I have dealt with Lg in the past regarding screens and they are unable to sell them as a spare as they are so expensive, they are only used in production and a complete new HD TV is cheaper to buy than a screen.
for example LG37LP1D £900.00, a replacement screen £1500.00
Its fixable. the question is how much of the inside broke with it.
cost for repair on that usually averages 45 to 65 dollars... unless tuner is damaged in most cases not. if not hooked to tuner then maybe a new isolation block..simple job
Good luck
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