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Sound but no picture, faint with flashlight. Tested the power board with LCD connector plugged in, 79v. Tested removing LCD connector, 79v. Not good at these things, what part do I need to replace?

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The ballast board for the backlight. You can get parts here : TV Parts Universal TV Stands DLP Chips ShopJimmy

Posted on Jan 04, 2017


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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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SOURCE: sound works but no picture. black screen

I've had the same problem. Usually, if I turn the TV off and then back on again, it's fine.

Posted on Mar 05, 2009

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SOURCE: Philips Magnavox 37" LCD Flat

Disconnect the LVDS Cable that runs from the small signal board to the display panel and apply power,if the screen comes on,the Small signal board (aka Scaler Bd ) is the faulty board. other than that,all that's really left that has gone bad for me is the logic board.

Posted on Jul 07, 2009

  • 1077 Answers

SOURCE: Sanyo DP15647 powers on but no display, trying to find fault

I had a similar problem like yours with a different TV. I had to find the Service Manual for the TV to really find the problem. The manual gives me every schematic and parts number list for every board in the TV. It turned out to be a bad Inverter Transformer. It was one of six that powered the LCD screen. You might have the same problem.
The Service Manual on the internet for most TVs are under $20. It's the best material for diagnosing the problem. It worked for me.

Posted on Jul 15, 2009

  • 1779 Answers

SOURCE: 47inch toshiba lcd tv (HL167) black picture, but

Best to replace both at the same time . Yes they are easy if you can find the parts.

Posted on Dec 15, 2009

  • 11361 Answers

SOURCE: Picture keeps blacking out.

No way to test the caps, now that is funny!
Bad caps can look normal but can have high ESR.
If the output voltages of the supply checked normal with out high AC ripples, than more likely to be other problem some where else.

Posted on Dec 01, 2010

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Samsung TV (model UN40H6203AF) 40" LED. No picture, have sound. Flashlight test can see faint menu screen. Have replaced power supply & main boards to this point. Ideas as to what to do next?

Hi Terry,

If you can see the faint picture in flash light means the power supply and the main board is working. The real culprit is the backlight. Even one bad LED in the backlight will switch off the whole array. To repair this fault the panel has to be opened and the defective LED or LEDs are to be replaced.

This is a complicated, delicate and risky job and must be attempted by an expert only. You may end up damaging the screen permanently if you have not done it before and try to DIY.

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What is the repair for a Samsung LED television with sound but no picture?

disconnect and reconnect all the plugs and see if there is a change
Check the capacitors, if they are swollen on the upside, replace them and it will be fixed.
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How can I fix black screen on Philips 42" LCD TV?

chances are it is cracked solder joint on internal board,
check link below, press the helpful button

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1 Answer

Powers on, no display

Do you have sound? If so, dim the lights in the room and shine a bright flashlight on the screen and see if you have a faint picture. If you have a faint picture, you have a backlight problem. On most of those sets, the backlight inverter is combined with the power supply so that power supply/inverter board will more than likely be the culprit!

Dec 07, 2013 | Vizio E420VA 42 in. LCD HDTV

1 Answer

Tv powers on but no picture or sound

Take a flashlight, dim the lights in the room and shine the light on the panel with the set on. If you see a faint picture, you have a backlight problem. If you indeed do not have a picture or sound, you could be looking at a bad power supply or main board

Sep 08, 2013 | Samsung LN37A550 37 in. HDTV LCD TV

1 Answer

My Vizio 55XVT1A power on, has sound, but no picture. I changed new power board, main board, T-cond board, but it still same problem. What's wrong with it? Is it anything with inverter board? Than

If this is an LCD tv the backlight inverter is bad, a good way to check it is to shine a flashlight close to the screen and see if you can see a faint picture.
Let me know what you find

Feb 18, 2012 | Televison & Video

1 Answer

Faint or no picture on olevia / syntax tv model LT-37HVS

When you tune to a station and get sound I presume the screen is black so do the following.
Place a bright flashlight against the screen. Look for an image around the edge of the flashlight.
If you see an image the problem is probably one of three causes.

1) Power to the inverter board is bad.
2) Inverter board has failed.
3) The CCFT(cold cathode fluorescent light) are dead.

Someone knowledgeable in electronics can diagnosis it.

Mar 05, 2009 | Olevia LT37HVS 37 in. LCD HDTV

1 Answer

TV wont come on

Check fuse.
Is this a LCD, Plasma ect...
Do you have sound?
If LCD and you have sound use a flashlight, shine on screen check for faint picture. If you see picture the problem is the backlight has failed, check inverter board for blown fuse.

Jan 09, 2009 | Televison & Video

1 Answer

It's all black

If you power it on, take a flashlight and shine it on the lcd at and angle and look real close to see if you can see a faint image. If you can, then your backlight in the screen is not working.
Also, you can attatch an external monitor to it, while its off, then power it on and see if it lights the external monitor. Try that and let me know your results.
If you get a picture ok on the external, and you can see a faint image on the lcd using a flashlight, then it could be the backlight inverter board or the bulb itself inside the lcd went out.
If you don't get any picture at all, using an external monitor and can't see a faint image on the lcd using a flashlight, then I would say there's other problems with the laptop itself. Could be a mainboard problem, power issue, etc..

Oct 24, 2007 | Compaq Presario X1000 Notebook

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