Question about Mitsubishi CS-40503 TV

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Narrow blue horizontal line across screen on intial power up

The picture comes in after about 30-45 seconds, still crystal clear after power up. If the TV is warm this does not happen with power up, only after sitting 6- 8 hours. Mitsubishi CS-40503

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  • 55 Answers

You have trouble with the vertical deflection circuitry. Probably something in the driver circuit or power supply to the driver. Maybe even a cold solder joint since it comes up after a little warmup.

Posted on Jan 17, 2009

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Hi and welcome to FixYa,

Your described problem indicates failure at the vertical deflection circuitry. Almost always, this would be a defective vertical IC. In some instances, this could also be caused by the absence of Vcc (supply voltage) to the said IC. This is a relatively easy/quick repair. What would be more challenging is identifying the IC, removing it, and replacing. Replacement would be readily available from most electronics part stores including Radio Shack.

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