Question about Vizio VO47L 47 in. LCD TV

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Vizio 47" lcd, no picture,

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Hi goldenstripm,
Power on the unit in the dark room then shine with the flashlight directly in the screen, you will barely see the images. This is because your backlight is not functioning. The following reason is the caused.
1. Power supply - missing B+(supply voltage) coming from this board feeding the inverter board. This is caused by faulty transistor, dried/leaky electrolytic capacitor, open fusible resistor.
2. Inverter board - even the B+ is good from the power supply, if the fuse, driver transistor, driver transformer is faulty no output to the backlight resulting to black picture.
3. Busted backlight - even inverter board is good but if this is busted resulting to black picture also.
Diagnosing the fault is technical and if you don't have necessary tools and test instrument and can't fix it yourself, I would advice you to look for an experienced technician to isolate the problem.
Hope I helped you.
Have a nice day!
Thanks for using Fixya.

Posted on Apr 06, 2011

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Check the projection lamp. It is common for those to go out for flat screens

Posted on Apr 06, 2011

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1 Answer

What is wrong with my vizio e470va 47 inch it has sound but no picture


Back-light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electronicshelponline.blogspot.com/

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The cable box have problems,tries replacing the incomming broadcasting connecting wires,that goes to the tv Tuner signal board.If u still have the same problems,call ur cable company for a cable box replacement.

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Clean the LVDS cable connectors to get rid of the oxidation. This may do the trick.

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0ne of 3 has failed:
(in order of probability):

1. Backlight inverter
2. Power Supply
3. Backlight

More specifically on #1 and #2 - capacitors either bulging, leaking, or exploded.

Please seek the expertise of an experienced TV repair technician - as they contain potentially lethal voltages that must be properly discharged before work can begin.

Thanks!@#$

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1 Answer

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Replaced the LCD inverter it dead.Replaced that board u will get picture back.It usally a long board..

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this could be one of two problem. first, check if you have back light. If you do then the problem is with the M/B. Second, if you don't have back light then the inverter is bad and needs to be replace.

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