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The supply led blanking and tv is not on what problem

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LG model 47LN5700-UH LED TV. There is a single thin vertical line on the screen. I have changed the LED/Power Supply board and LED strips. What might be causing the vertical line?


You have wasted your time and money. The LED power supply and LED strips are only the backlighting. The only thing that might fix is a situation where you have a blank screen with the sound working.

If you don't know what you're doing, DON'T OPEN THE TV UP TO FIX IT, THERE ARE HAZARDOUS VOLTAGES ON THE POWER SUPPLY BOARD, EVEN WEEKS AFTER THE TV IS UNPLUGGED!

If you don't know how to do it yourself, find some local Electronic repair shops, get quotes, try to find reviews on the shops.

Nov 26, 2016 | LG Televison & Video

1 Answer

When testin a power supply or led board on tv do i test dc or ac with multimeter?


Your power supply board is working if you get audio and imgaes.

You test AC only the AC side of the transformer before the Rectifier Diodes. Everything after the Diodes will be in DC.

did you get to see any spec of backlight as shown in
LCD LED TV Repair No Image Blank Black Screen Flashlight Test How to Fix...

Mar 23, 2016 | Televison & Video

2 Answers

No picture only sound.


Engineers are right, you need a new LED panel., or the component that supplies the light to the screen.

Mar 18, 2016 | Philips 55pfl4706df7 4000 Series Lcd...

1 Answer

Vizio E420I-A0 Black Screen


Check the attached links,
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."


Vizio E470i A0 Blank Screen No Backlights How to Test Power Supply...
Testing TV Backlight LEDs
Testing tv backlight leds EsBuzz net
http://www.badcaps.net/forum/showthread.php?t=41334

Mar 10, 2016 | Vizio E420I-A0 42" LED TV 1920x1080, 120...

2 Answers

On my Hisense 50K23DG LED TV, I have sound but no picture.


LCD & LED TV Repair - No Image & Blank Black ... - YouTube

? 5:56
https://www.youtube.com/watch?v=xUzCLgoSPGM
Sep 15, 2014 - Uploaded by ShopJimmy.com
LED & LCD TV How to Diagnose Symptom of No Image on the Screen CLICK HERE to BUY ... I have an LG ...

Hisense 50K360G has audio no video will not turn on logo ...

? 1:48
https://www.youtube.com/watch?v=xI3MpZukKm0
Nov 20, 2013 - Uploaded by After Hours Tv & Pc repair
Find the correct TV part for your TV and more at ShopJimmy.com Click Here: http://bit.ly/ShopJimmy6 Want to ...

All comments on LCD & LED TV Repair - No Image & Blank ...

https://www.youtube.com/all_comments?v=xUzCLgoSPGM
I have sound and picture but no backlight. .... how do you replace the back lighting on a led lg tv? ... I have a 42 inch LED LCD combo DVD TV made by RCA.

My LED TV has sound, but no picture. - Tom's Guide

www.tomsguide.com/answers/id-2771720/led-sound-picture.html
Dec 28, 2015 - Hi, I have an RCA 32" LED 1080p TV that is less than 2 years old, and it has already lost the video. I can hear sound, and I can see lights in the ...

53 HISENSE complaints and reviews @ Pixxed Consumer

hisense.pissedconsumer.com/



Jan 13, 2016 | Hisense Refurbished 50"" 1080p LED-LCD...

1 Answer

Soniq PT42SH plasma TV power on. No back light and no pictures


SONIQ LCD TV REPAIR Blank flickering screen Energy ...

? 1:32
https://www.youtube.com/watch?v=FUqdi7lwmcE
May 29, 2013 - Uploaded by WastedOne2
Fix ya Soniq Tv once loaded up hit menu button then channel + then ... SONIQ LCD TV REPAIR Blank flickering screen Energy Saving Mode Issue ... Easiest TV repair - How to Fix Power [TV turns off, freezes, or won't turn on] ... Common easy LCD TV fix: bad picture screen rainbow colors - Duration: 4:04.

No Image & Blank Black Screen Flashlight Test - YouTube

? 5:56
https://www.youtube.com/watch?v=xUzCLgoSPGM
Sep 15, 2014 - Uploaded by ShopJimmy.com
LCD & LED TV Repair - No Image & Blank Black ScreenFlashlight Test - How to Fix LCD & LED TVs ... Most LED TVs will have a t-con board, a power supply board, a main board and an LED ..... SONIQ Australia 1,718 views.

Soniq PT42SH plasma TV power on. No back light and no ...




Jan 08, 2016 | Televison & Video

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How do I fix my Samsung 40 LED TV that has sound but no picture?


Samsung 60-Inch 1080p 120Hz Slim Smart LED HDTV ...

? 10:42
www.youtube.com/watch?v=hcVhHU322Gk
May 18, 2015 - Uploaded by Thomas M. Landry
samsung un60h6350 60-inch 1080p 120hz smart led tv,samsung... 120hz smart hdtv,slim led tv,65 inch smart tv deals,samsung 40 led 1080p 120hz ... LCD & LED TV Repair - No Image & Blank Black Screen Flashlight Test ...

Oct 15, 2015 | Samsung 40" 1080p 120Hz Slim LED Smart TV...

1 Answer

What parts to fix a blank screen besides power supply and main boards (have tried both)?


STOP Get a SERVICE MANUAL and follow instructions before you make it any worse by "Mucking around with it" it needs to be serviced in a set careful methodical way u cant just replace boards and hope as those boards may damage or be damaged, to have any chance u need to get the book plain and simple less expensive too.

Aug 21, 2015 | Toshiba 39L1350U 39" LED TV 1920x1080, 120...

1 Answer

SANYO DP26647 blank screen, please help


U have LED front power tv light come on and bliking?Than ur power suply it dead.Power supply board must be replaced.Tries Shopjimmy.com,Ebay.com to buy a refurbish power supply board.

Sep 21, 2009 | Sanyo DP26647 26 in. LCD TV

1 Answer

Philips TV model number 27PT543S37A


TV turns on but doesn't stay on goes in and out then blank screen. LED light stays on during the entire time your problem is called hunting you can check power supply of your tv .It common problem in Philips T.V. Thanks

Sep 11, 2007 | Panasonic CT-32SX12 32" TV

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