Question about Sharp Televison & Video

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Hi, I have a Sharp LC-50LB371U Manufacture date 6/2015. I have no picture, no audio (however I hear a tone when powering off TV), no backlights. I can see the menu when doing the flash light test.

Voltage tests on the main power board on the LED connector are as follows. I get 65.74 VDC on LED 1 and LED 2. When I disconnect the connector plug I get the same voltages on the opposite side of the pins. Looking for assistance to determine if I should replace the board first. Thanks

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  • Sharp Master
  • 76,060 Answers

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://homenol.blogspot.com/
http://electronicshelponline.blogspot.com/
http://electro-medical.blogspot.com/
For 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.
Search the site by type in the "brand name" of your device; [Exclude the model number], in the "Search box at the top right of the display window of the Homepage" to get gathered related posts.
{View the site in web view or by a desktop to see the search box. Mobile view has no search box.}

Posted on Mar 24, 2019

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6ya6ya
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SOURCE:

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Posted on Jan 02, 2017

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SOURCE: Vizio 42 in L42HDTV10A no power no lights no nothing

You can look at the various module failure symptoms and service / replacement options for the L42HDTV10A here:
http://www.coppelltvrepair.com/search?Q=l42hdtv10a&As=false&Pf=&Pt=&Sid=false&btnsearch=Search

Posted on Apr 25, 2013

gopakumarg43
  • 76060 Answers

SOURCE: Samsung led tv - turns on,audio ok, no video, backlight on

Sounds like T'Con board fault. Check and replace it. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/

Posted on Oct 31, 2015

Testimonial: "I have already replaced T-con board. here is what happens. initial tv had blank screen , with audio. and back light on. so I ordered T-con board and replaced it but now with new T-con board connected backlight is flickering like a strobe light. and I have tried with 2 different lvds cables. same result of flickering."

olga8004
  • 7 Answers

SOURCE: No back-light on LG LED TV

That means dead transformer supply chain. Replacing search not possible, donor Yes

Posted on Aug 08, 2016

AJIN G
  • 6694 Answers

SOURCE: I have LG 42LN5300 which is reading 230VDC at led + plug and no back lights. All other voltages going to main board are OK, I changed main board because of flickering on and off screen, so is it MB

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.

Posted on Jan 20, 2017

Testimonial: "I ordered and replaced inverter board, no change, picture is still dim pulsating while everything else works. Power board is separate on this model, so anyone know why voltage is 230VDC at LED+ point when it says on board it should be 157VDC for 42 inch, could it be the MAP3202 IC which causes higher voltage, or another component?"

  • 2794 Answers

SOURCE: Have Vizio E60-c3 LED TV. Picture not working, Backlights on, Audio works. Ordered Complete repair kit from Shop Jimmy.

About 99% of the boards from shipjimmy are good, unfortunately lI think you have a bad panel and its destroying the tcon board, did you check the fuse on the tcon board?

Posted on Feb 21, 2018

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1 Answer

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notallbad1@yahoo.co.uk

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