Hello XXXXXXXXXXX,
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What is the model number of the TV?How long have you owned the TV?What have you tried to correct the problem?What type of electronic training do you have?What type of electronic test equipment do you own?Thank you again for trusting us with your problem.
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Very likely the TV has what is called a cold solder joint. This is very common in LCD screens. The repair is both difficult and expensive. I would not recommend it as a DIY repair since the possibilities of making the problem worse is a very good possibility. Even for the trained electronic tech the repair can be difficult. Do a Google search for "lcd cold solder Westinghouse" and you will see this is a common problem. Do the same search with the word Westinghouse and you will see this is a very common problem for all LCD TV sets. You might try resetting the TV by unplugging it for an hour or so, or jarring the TV to see if that helps but other than that expect to pay several hundred dollars to get it working correctly by a repair shop. My recommendations would be to try the reset and adjusting the convergence and if none of that helps, use the TV as long as you can stand the problem and then try to re solder the bad solder connections on the LCD screen but be prepared to replace the TV.
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