LG 47LN5700 47" 1080p Smart TV 120Hz Dual Core Direct LED Value Bundle Logo
Samantha Whitehead Posted on May 11, 2016
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No picture on tv but does have sound

Tv has no picture but does have sound. Did the flashlight test where turn tv on push menu and shine flashlight on tv to see the menu. I see the menu. I have narrowed the parts down to a tcon board and the LED driver. Just trying to figure out what one or both are needed to fix the picture. Doing this myself. Just want to know what part needs to be fixed. Thank you very much.

1 Answer

Electro Med Services

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  • LG Master 6,694 Answers
  • Posted on May 11, 2016
Electro Med Services
LG Master
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Joined: Dec 13, 2010
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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://electro-medical.blogspot.com/
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.

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My vizio tv has sound but no picture and already did the flashlight test

If your Vizio TV has sound but no picture, and you have already done the flashlight test, it may indicate that your TV's backlight or power supply is malfunctioning. Here are some steps you can follow to troubleshoot the issue:
  1. Check the cables: Make sure that all cables are properly connected between the TV and any devices you are using, such as a cable box or DVD player.
  2. Check the input source: Ensure that the TV is set to the correct input source that the device is connected to. You can cycle through the input sources using the input button on your TV remote.
  3. Power cycle the TV: Turn off your TV and unplug it from the power outlet for at least 1 minute, then plug it back in and turn it on again. This can sometimes resolve issues related to the TV's power supply.
  4. Reset the TV: Try resetting the TV to its default settings. You can find this option in the TV's menu settings.
  5. Contact support: If none of the above steps resolve the issue, it may indicate a hardware problem with the TV's backlight or power supply. In this case, you should contact Vizio support or a qualified technician for further assistance.
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I have an Element FW408 no picture only sound

Do the flashlight test. With the TV on and listening to a program, shine a flashlight on the screen. If you can see a faint picture, the LED driver is bad. If you cannot see a faint picture, the T-con board is bad. TV Parts Universal TV Stands DLP Chips ShopJimmy You can get parts here.
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My samsung 62" tv has no picture/have sound

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When I turn on my Sharp TV the picture comes on for a second then goes black. The sound is working but the picture stays black.

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Ideas on parts to replace?

Here's the test. With the TV on shine a flashlight on the screen. If you can see a dim picture the backlight circuits are bad. If you cannot see a picture the T-Con board is bad. You can get parts from here: TV Parts Universal TV Stands DLP Chips ShopJimmy
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No picture

Sounds like you have a backlight problem. To verify this, turn on the set, dim the lights in the room, and shine a bright flashlight on the screen. If you see a faint picture you have a backlight fault. It could be as simple as a bad capacitor in the power supply, or a faulty inverter board, or in rare cases a bad backlamp.
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First make sure to hit the menu button on the TV's remote and if nothing is there then while the set is ON turn a bright flashlight on and shine at angle into the set push the TV menu button if you can see a image then your back light is not working.
Cost of backlights is around 150.00 and power supplies around 100.00.
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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.
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