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I have a Mitsubishi TV Receiver CS-40503. The problem is when the power is switch ON a BLUE HORIZONTAL LINE at the middle of the TV is coming out wisth no sound.

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No sound is probably because you're not on the right input but the horz line is a failure in the vertical circuit. Could be the vertical Ic itself Ic401 (LA7833) or the feeder caps just in front of it... In either even it in itself not an expensive repair. Be aware though that's an old unit and it is likely that several caps going bad through-out the unit. Make sure that you ask the tech to go through the unit with an ESR meter and test all the remaining caps in the power supply, horizontal, HV and regulation circuits. A little preventative and that set will still be running long after I'm dead and gone...
Bill

Posted on Apr 26, 2008

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Jan 17, 2011 | Mitsubishi CS-40503 TV

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Actually the model is cs-313050. its quite old. the problem is that the tv won't work in the way that when you turn it on (it won't even turn on anymore) there is nothing but a white or blue lineright in...


you didn't mentioned if it is a horizontal line but i think it is.
It seems that you have a faulty vertical I.C. that scan vertical line.Because you it is defective you've lost the vertical scanning thats why you have only a horizontal line on the screen.

You will confirm it by powering on the unit with your cable signal present.When the sound is present on every channel it is confirm that you have a problem on the vertical section. You must look for a qualified technician to solve the problem....

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Mitsubishi CS-40503 TV previously had discoloration in the corners and lines at the top of the screen. Now I have no picture at all. Is it worth trying to fix?


no picture?do you see a white horizontal line in the mid?or black out?
its up to you if its really worth fixing. if its really old then ,i think its time to buy a new one, if not try comparing the cost.

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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.

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