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Vizio vw42lfhdtv10a buzzing sound from backlight inverter master


\015 Buzzing sound from backlight inverter. Screen is slightly dimmer\015

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Vizio vw42lfhdtv10a buzzing sound from backlight inverter master


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I have a Vizio VW32LHDTV10A that produces sound but no picture. I have checked the main power board for 24v to both backlight inverters and 24v is present. I then hooked up both backlight inverters and turned the TV on and the blue LED on the Slave inverter comes on, but goes off after only a few seconds. What further tests could I perform to check which part is defective or what component is the most likely cause?


When you reconnect the inverter boards, when the LED goes off on the inverter board, do you still see 24vdc? You shuld also ty hooking up test lamps to the 24vdc to see if it will stay on.\012Right now I have a feeling the problems are in the b ... Flat Panel Televisions

I have a vizio 42 inch tv and all the sudden the screen just went black .no picture,just sound and there is no light on in the back.could this just be a lamp or is this what is called a backlight inverter and is there more than one inverter?


There's a good chance you have failing electrolytic capacitors either in the power section or the inverter section or both.Any caps in these (or any) sections that look bulged at the top, or bulged/leaking at the bottom need to be replaced. ... Flat Panel Televisions

I have a vizio vz37l tv. When i turn it on the screen lights up, however there is no picture on the screen. the sound works, its just no picture on the screen. I read on a couple of the posts on here, and figured the proper course would be to replace the t-con board. I just finished replacing the tcon board and still the same thing. I called vizio about the problem and they say that if the screen lights up then the problem wouldn't be the backlight inverter boards, that it might be as simpl


Its the main board... ... Vizio VX37L Television

Vizio Model vw42lfhdtv10a started a couple months ago with a buzzing or "interference" noise from right side of TV. Today my fiance turned on tv has sound but no picture. There is no light at all!!!


... Flat Panel Televisions

I have a Toshiba Regza 42HL67US, it turns on and baclights come on for a second then shut off, still have sound no picture, bought inverter boards (master and slave) but still does it. What else runs the backlights??? Don't want to keep replacing boards till I get it fixed.


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Replacing a Vizio Backlight Inverter


I have a television that did this. The picture went out but it continued to have sound. It was the projector bulb. I ordered from a dealer on ebay, very resonably priced. It came with instructions on how to install it and was a very easy fix. ... Vizio 42 in. LCD TV

Black screen and have sound vx42lhdtv10a(vizio 42 2008)power supply is ok(12v,24v,5v) main board have 4v and all fuses is good . my question is? how can i test my inverter board output voltage?how can


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Vizio e371va I've had the TV for a couple of years and after getting the sound settings set the TV has been great. All of a sudden the I am not getting any normal sound out of the TV, but I get a loud buzz that sounds like it is coming from the right side of the sound bar on the bottom. So to clarify I am getting no volume from the show that is on TV, but get a loud buzzing noise. If I disconnect the HDMI connection the sound goes away. I plugged my computer into a different HDMI slot to


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Vizio VT470M no picture, no sound, no backlight. Power supply board looks good all voltages appear correct (24V, 5V, and 3.7V) and no "bulged" capacitors . When I unplug unit for two hours, the screen comes on normally backlight comes back up and picture is normal, but changing the channel causes it to go dead again. Bringing up menu with remote is really sluggish and when attempting factory reset, it goes black. Vizio light on the front of the TV comes on and off when pressing power button,


Im having similar problem and with my limited knowledge of lcd tvs and the voltages ALL being good except the pwr on or sw on voltage from the main board to the power supply which tells it to switch everything on Im guessing that something is going w ... Vizio VT470M 47 in. TV

I have a Samsung LN46A530 46" LCD TV. Lost my backlight and wondering if the two wire connectors feeding the R and L inverters is where I would meter for power, and if not what are these for ? Or is it the ribbon cable on the top left (it's pin ids are 1. 12v_cold, 2.FB, 3.FB, 4.GND, 5.GND, 6.LD, 7.LD). Would this TV use 12 V to power the inverters ??. The inverter enable is on (5V), so I assume it is either the pwr supply or the master inverter.


... Flat Panel Televisions

DP46849 Sanyo. I have checked all of fixya for solutions. I hane no sound or screen but have a green light when turned on. It will flash as if it is in protect mode. I have checked voltage and there seems to be 5v, 12v and 15v as indicated on power supply. I cannot find a 24v to read from but I did pull the master inverter to see if I had sound. Still the green light flashes and no sound. I suspect power supply only because when it is turned off I hear a high pitched whistle that slowly goes on


Hi,Power supply board seems defective and causing problem. Please replace power supply board to solve tv issue, required board is available in ... Flat Panel Televisions

My vizio gets green lines across screen and looses sound after about an hour of operation sometimes with loud buzzing noise. Help!


Since the video and audio both are affected, we have to assume it is in the central processor next to the tuner, which separates these two. I suggest you note down the IC numbers, look for its datasheets and study what are the functions of each IC. ... Vizio VP322 32 in. Plasma TV

Need master and slave inverter boards for 47" VIZIO TV 2007


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Can you fix this cracked screen problem on Vizio VW42LFHDTV10A? and no sound?


We used to say have a short service on the patio and buy a new set---damaged panel display unit is more than set cost (if it is even available)Let it go---when damaged it can instantly damage other boards/parts in the set.Run a car with n ... Vizio VW42LF 42 in. LCD HDTV

Vizio model #GV47LFHDTV10A PICTURE /SOUND all work but there is a sound like it is buzzing sound coming from the boards that say LG Philips LCD . one on each side. There is a thin strip in middle of screen and wires at bottom connecting the two. I unplugged on side and the noise stopped. . Do I need to replace both and what are they called.


... Vizio VO47L 47 in. LCD TV

Hi, can you help me with this TV please. Hi, I have a Olevia 232-T11 LCD TV. First my TV wouldn't turn and the blue light just stayed on. I replaced the power supply board and now my TV turns on and the screen lights up but I get no picture or sound. The slave backlight inverter board has a blue light when you turn the TV on but goes away shortly after. The screen stays on but I have no sound or can't control the channel, volume or source button. Please help.


If the tv is not coming on but there is no picture or sound then it is a 100% guarantee that its a problem with the audio/video main board of the tv. I am sure that replacing the same would resolve the problem. Please get me the part number that is p ... Flat Panel Televisions

Backlight inverter vizio flickering - Vizio 42 in. LCD TV


... Vizio 42 in. LCD TV

AQUOS LC-46E77UN I am trying to trouble shoot my tv and thanks to all the people on this site, I have come a long ways. In talking to one person, they had thought that one or both of the inverters were bad, the problem is that the display stays dark, So I replaced both the Master and Slave Inverter boards only to have the same result no display or sound. If I hold my LED flashlight up to the display, I can see the SNOW in the background from no input, so I don't believe that the display is b


Contact the authorized service center for Sharp at your town. Never make it irreparable please. ... Sharp AQUOS LC-46E77UN 46 in. LCD HDTV

Replace the power supply and the backlight inverter to my samsung has sound but no pictuer can u help


Check whether CCFL lamps are good or not. Check whether the newly replaced back-light inverter functions well. ... Samsung LN-T4665F 46 in. LCD Television

My samsung tv replace the power supply board. got sound no pictuer replace the backlight inverter stell no picture


You have to check whether the back-light inverter gets its proper voltages to function. There as many voltages that controls the back-light inverter. Check these is a skilled work. Contact any experienced service technician. If you are not ... Samsung LN40A650A LCD TV

VX37L Screen Suddenly Went Blank, Now No Image, Sound Only on Cable Input, VIZIO Logo Lights Up


Hello, turn on the set, grab a bright flash light and dim the lights in the room. Shine the flash light on the screen, if you see a faint picture on the screen, you are dealing with a backlight problem. There are several things that can cause thi ... Vizio VX37L Television

42 inch Vizio LCD LED TV has sound, but no picture


... Vizio m420nv 42 in. LCD HDTV

Ssi-400-14a01 backlight inverter buzzing


... Samsung UN55B8000 55 in. LCD HDTV

I have a Vizio Model SV47XVT1A LCD, it powers up but no picture or sound. I put a new power supply board and it does the same thing. Could it be the back light inverter board?


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