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Vizio 50" P50hdm Audio with No Video

The green light comes on, w/audio but no Video or menu screen. when powered off the green light flashes 10 times and turns amber. I have replace the power supply board and the main board, the result is the same. After a hard reset, a faint clicking sound can be heard however the cooling fans do not come on. Any suggestions as what to try next will be greatly appriciated.

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  • sp84u May 05, 2008

    powers up no audio,.no video just a blank screen what should i do?

  • armando enriquez Jun 10, 2008

    I have a Vizio P42 Plasma TV. Worked fine for two years. Then When I was watchin it, the Screen blinked and went out. The sound was fine on all inputs. I am and Electronics Engineer expert in Aircraft electronic systems. Without making any examination, I tought the power supply or voltage to the video card or drivers was out. I ordered the power supply. Later, I took the back panel off. The Y board (vertical drive) has two fuses and one was out. 4Amp at 240 volts. The voltage was 90 volts. This is where the power is consumed on High wattage usages of Plasma TVS. I replaced the Fast Acting Fuse with a slow Blow Fuse and power up the TV. This time the entire power supply to the TV went out. It has a safety feature to turn the power out when overdriven. Then I believe that the Y driver was bad and price it at $170 by Vance with 75.00 core charge plus shipping. I am thinking about it. The price of the same tv is 800 if I decide to buy a Vizio again. I have a very diffult time trying to find the shematics or at least a block diagram and nomenclature of each of the boards in the TV. Nobody but Vizio has them and they do not release them. Others, like Samsung or Sony you can buy and download on the internet at a reasonable price of $10.00. Even if I repair it at $200.00 I end up with a tv that will probably fail again in two years. Why not buy another kind of TV, get a two year extended warranty and get the schematics if I needed. My advise to others. Do not buy a Vizio, if you buy it, get the extended warranty which will be probably not so good and pray it does not fail.

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When tv is on horz trans is damge

Posted on Jul 11, 2008

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Check and replace damaged component/s at it main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" or "Magazine" will make surf easy. Surf the site with patience. Pull up older posts. Do asearch by type in the brand name of your device at its search box.
http://electronicshelponline.blogspot.com/
It will be best to replace the power supply regulator board as card basis.

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this is most likely the sustainer board(s) problem. Replacing the sustainer boards should correct this problem for you. you can get the parts at vancebaldwin.com

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replace the sustainer boards should correct this problem. New sustainer boards may cause red and green pixilation. If this happen, replace control board and TV is as good as new.

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For your Zenith P42W34D TV. The problem cause the a bad Y drive board. Replace the board will fix it.

Hope this will help.

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1 Answer

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Do you have an amber pilot light? If yes power supply is working.

If amber light turns green when power button is pressed then set is turning on. If not then you problem is most likely on the main board, the panel that has all the inputs on it.

Is the monitor set to an input with audio Set defaults to AV1 input when power is removed. The most common problem with this set is sound ok no picture. This is a display problem usually Y or Z sus boards.

If it is truly no sound and no pix then the problem is in ether the power supply or the main board.

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