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I have a sharp LC-50LB261U TV. It has sound but no picture. Do I replace the power supply or the main board?

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Without doing any testing it is just a guess as to which part is defective.

Posted on Mar 13, 2017

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Posted on Jan 02, 2017

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I have a SHARP AQUOS LC-60LE660U. I turn on my TV, the picture comes in and out. But I still have sound. Can it be the T-Con board? Please help.


Sounds like The main power supply regulator section circuit fault. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.

Nov 09, 2017 | Sharp Televison & Video

1 Answer

My Sharp LC-50LB261U tv screen went black but i still have sound. i replaced t-con board and power supply board and have same problem. can you help?


I don't have a service manual for that set so I'm only able to help on a limited basis...Have you tried the flashlight test?...if the backlights are out then it could be a backlight driver board if it has one? or defective LEDs. See what you have for voltage going into the panel LED's

Oct 18, 2017 | Sharp Televison & Video

1 Answer

My sharp aquos LC-60E79U has no picture. Perhaps I have a backlight 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://electronicshelponline.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.

Oct 13, 2016 | SHARP ELECTRONICS DE AQUOS LC-60E79U 60"...

1 Answer

Heard a pop and tv stop working


Hello
The power supply board to your tV is faulty. The sound you heard is due to a bursted capcitor. If you are aware in electronics and efficent in servicing LCD TVs, open your tV and locate the switching power regulator section. Look for any bulged or bursted capacitors in it. If is there, replace it with same capacity and size. Its capacity will be mared on it body intself in MFDs units. I hereby attaches a picture [not the power board of your TV; but to know you what a bulged capcitor will look like.

gopakumarg43_78.jpg Look at the red arrow marked capacitors. They are all damaged [bulged] ones. You can see a good one at the top right of the baord. The only repair work that can be done with power supply of LCD TVs are, replaceing these types of capacitors if any. If you cannot see any of them like this in your TVs power supply [the picture of Sharp LC series LCD TVs power supply is attached below]; the pop sound you heard is from the switching transformer. It is very difficult to replace them and very rare to get from open electronic spare part market. if this is the case, you have to replace the power board as card basis, and it is good too; rather than making "surgery" to it.

gopakumarg43_79.jpg
This is the power board to your TV. As you can see, it will be very difficult to replace any component to it, and you must have a good concept of desoldering and soldering and equipments ot do the work. After replacing the power supply some adjustments to it should be done to accept the new power board to main system board. In rare cases, the main system board will accept the replaced power board. If so you are lucky. If you haven't enough knoledge in this matter, get it repaired by any well experienced service techinician or by the authorised service center for Sharp at your town
If you want any more assistance from me, feel free to get me by Fixya. OK.

Sep 23, 2011 | Sharp Aquos LC-37GD6U 37 in. LCD HDTV

1 Answer

TV Sharp Aquos LC-32D44E/S doesn't come on Status light turns green for 10 seconds then turns red but no picture or sound.


Good day to you and welcome to fixya..

That problem is usually have 2 causes..Its either power supply board or main board..

Please take this steps on how to determine the problem:
1. Open the back cover.
2. Check the power supply output...It should have 5vdc for the main board..12vdc or 16vdc for the audio and 24vdc for the back-light inverter..
3. If those 3 voltage supplies have encountered voltage drop...The problem could be on power supply board..
4. If the power supply output is normal..The problem could be on the main board...
5. If the problem is power supply you should check if the capacitors are bulged on the top and try to replaced it..If you can't do that you can purchased new power supply board..
6. If the problem is on main board there is no D.I.Y repair on that so you need to buy a new main board that fits to your TV..

You have a better chances if you have failing capacitors on the power supply board..

Please watch this videos about capacitors..








Hope this solution will be helpful..

Thanks for using fixya...

Aug 13, 2011 | Sharp Aquos LC-32G4U 32 in. HD-Ready LCD...

1 Answer

Sharp lc-26dv12u about 2years old. All of a sudden


Sounds like the Main mother board is the problem. When the processor chip overheats, the programming information passing through the chip slows down. Most cases, replacing the main mother board will fix the problem.

Dec 29, 2009 | Sharp LC-26DV12U 26 in. LCD TV/DVD Combo

2 Answers

My sharp lc46sb54u 46 in.hdtv power light keeps blinking


Any indicator light on at all, if you see the light, then only the 5v standby power supply is working but not the main section of the power supply, it can also be the main control board hat is not sending signal to turn on the main power supply section.

Sep 01, 2009 | Sharp LC46SB54U 46 in. LCD TV

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