Tv powers off after 11 to 15 minutes !

A technitian just replace the power supply and a voltage regulator, he left and then the tv will power off after 11 to 15 minutes of runing. I know it is not the timer, because the timer mode is off not activated. another thig is the colors are not the same on the left there is alot of green, middle ok, left side a lot of red, the guy said the tv has a built in system that would clear the colors automatically in 3 weeks . is that true ? thank you.

piluchi Sep 09, 2007

I have no macnetic sources near the tv no speakers etc. when the tv powers off by itself , and I power it back on yes it startb back on some times the second try.
Is there anything I personally can do to fix the rainbow colors , to make it go to where they are supost to be ? THANK YOU again.

1 Answer

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1,153 Answers

He probably means the Deguassing coil, which is around the set. This is needed when the set is first turned on. Because of the earth polarized field, when you turn your set to the east, west or just a different degree, it affects the Deguassing area. This sometimes looks like a rainbow affect in your set, and sony's are bad about them. But all in all Sonys are good sets. If it does not go away it could be a problem with your picture tube, or the is a Magnet somewhere close by, like speaker or some type of big magnet. If so then remove Magnet and turn off and on until disappear. Is the pic good when running? Does the set comes right back up if you press power and wait another 11 to 15.?

Posted on Sep 09, 2007

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NOTE: If you found any defective parts or components that mention above replace it with the same value,type and ratings.

I hope this solution will be helpful.Thank you and good luck.

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Remove the back cover of your TV.
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Power transistor (regulator): Check the regulator if it is shorted or leak.
Resistor: Check the resistors specially the one that have a low resistance that near the power regulator.
Capacitor: Also check the capacitors if it is leak or bulging top.

NOTE: If you found any defective parts or components that mention above replace it with the same value,type and ratings.

I hope this solution will be helpful.Thank you and good luck.

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Remove the back cover of your TV.
After that,find the power supply board.
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Check the following to fix the power supply board:

Fuse: Check the fuse if it is busted or blown.
Power transistor (regulator): Check the regulator if it is shorted or leak.
Resistor: Check the resistors specially the one that have a low resistance that near the power regulator.
Capacitor: Also check the capacitors if it is leak or bulging top.

NOTE: If you found any defective parts or components that mention above replace it with the same value,type and ratings.

I hope this solution will be helpful.Thank you and good luck.

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Follow this D.I.Y procedures to find the exact problem of your TV.

Remove the back cover of your TV.
After that,find the power supply board.
If you already found the power supply,plug-in your TV and power it ON.Check the input voltage of it,using multimeter (AC range).If the power supply have no input voltage the problem could be the power cord.Replace it.
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If the power supply have a voltage outputs such as 5vdc,12vdc and 24vdc and the problem is still there.The problem could be the main board.Replace it with the same type and model # because the main board is no very difficult to fix and its very sensitive.
If the power supply have no output voltage or the voltage is too low,just ignore the step # 5 because the problem is not on the main board,its on the power supply board.

Check the following to fix the power supply board:

Fuse: Check the fuse if it is busted or blown.
Power transistor (regulator): Check the regulator if it is shorted or leak.
Resistor: Check the resistors specially the one that have a low resistance that near the power regulator.
Capacitor: Also check the capacitors if it is leak or bulging top.

NOTE: If you found any defective parts or components that mention above replace it with the same value,type and ratings.

Thank you and good luck.Please don't forget to vote and rate my answer.

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Follow this D.I.Y procedures to find the exact problem of your TV.

Remove the back cover of your TV.
After that,find the power supply board.
If you already found the power supply,plug-in your TV and power it ON.Check the input voltage of it,using multimeter (AC range).If the power supply have no input voltage the problem could be the power cord.Replace it.
If the power supply have the input voltage,try to test the output voltage if have 5vdc for the system and logic supply,12vdc for the sounds and 24vdc for the back-light inverter.Use your multimeter tester (DC range) to test that.
If the power supply have a voltage outputs such as 5vdc,12vdc and 24vdc and the problem is still there.The problem could be the main board.Replace it with the same type and model # because the main board is no very difficult to fix and its very sensitive.
If the power supply have no output voltage or the voltage is too low,just ignore the step # 5 because the problem is not on the main board,its on the power supply board.

Check the following to fix the power supply board:

Fuse: Check the fuse if it is busted or blown.
Power transistor (regulator): Check the regulator if it is shorted or leak.
Resistor: Check the resistors specially the one that have a low resistance that near the power regulator.
Capacitor: Also check the capacitors if it is leak or bulging top.

NOTE: If you found any defective parts or components that mention above replace it with the same value,type and ratings.

I hope this solution will be helpful.Thank you and good luck.

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