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SHARP LC26SB24U LCD TV has sound but no picture - just white screen. Tried cycling power and inspected circuit board/wiring, but detect no broken/loose parts.

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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  • 2 Answers

SOURCE: Power Surge damage. Suggestions on which part to replace.

I would start looking at the power supply, it's usually a separate board where the a/c line plugs into. In many cases i have seen that the problem you described is from a damaged power supply, sounds like something is shorting causing the power supply to continuously come on and off. I would first check the capictors to see if any of them have blown, usually cylinder looking and sometimes you'll see an X or a K at the top of the cylinder, if it's blown then the top will be bulging out instead of being flat. If all those look good then there is probably a short somewhere else like in one of the transistors, if so you'd be best to just find another power supply board to replace.

Posted on Nov 09, 2007

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SOURCE: Purchasing an internal circuit board part for a sharp LC 20S1E LCD TV

send me the model and serial number and i will be able to advise you

Lou Margo
Allied Electronics
loumargo@verizon.net

Posted on Dec 24, 2007

rey jr
  • 149 Answers

SOURCE: Toshiba TV model CZ27V51 - picture+audio off, red light flashing

hi there, Flashing light red means a shorted electronic component is need to be replaced. do some test at video section, most of it are diode, transistors, transformers. ty

Posted on Jan 27, 2008

Coldcut
  • 1554 Answers

SOURCE: Philips LCD model 26TA1000, vertical lines and blank white screen with no picture

it would be easier to find it stripped from a damaged set on ebay.
I see several there but need the part number to search
of course you may purchase that and find it to be the lcd driver.hopefully not.

Posted on Feb 18, 2008

worldvet
  • 859 Answers

SOURCE: Power Surge damage. Suggestions on which part to replace.

You probably have a sacrificial diode that blew out to save the rest of the monitor from further damage. The manufacturer should replace it with a refurbished one at little and sometimes no charge (comparatively speaking).

Posted on May 10, 2008

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Blank screen (but some light) on Sharp LC42SB48UT LCD TV


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://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.

Apr 22, 2017 | Sharp LC42SB48UT 42 in. LCD TV

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How to fix Sharp LCD model # LC-32SB23U flashing green power light and check and...


If the green power light keeps flashing on and off every second and tv will not power on unplug the tv for 5 minutes, then try this. Keep holding the VOL+ and CH- buttons down while you plug the tv cord back into the wall ac outlet till you get sound and picture for a second or two. You should be able to turn the tv on and off with the power button now. Next turn the power button off and unplug the tv for a few seconds and then plug it back in and turn the power button back on. Watch the screen and see if the sound and picture comes on, best to check in a dark room to see better, if sound stays on and picture comes on a few seconds and back off you have a bad CCFL backlight lamp in the LCD panel. This tv hads (10) CCFL lamps part # RLMPLA029WJN1 cost $15.93 at www.partstore.com or $19.49 at www.encompassparts.com in it and if one is burned out it will not let the tv picture be powered on till it is replaced. To check and replace the CCFL lamp you will have to unplug the ac cord from the tv back and remove 10 screws holding the back on. With back removed unplug the wire plug on the power button circuit at top left side of the black LCD screen trim, remove 4 screws holding the top of black trim, lay speakers off it, and release trim clips, (4) at top and (2) at bottom with a flat screw driver, and lower the trim to unclip the LED circuit board at bottom left side on the trim, leave the wiring pluged into this LED circuit board . With trim removed, at top of LCD panel remove the (2) PC ribbon wire clips with thumb nail by lifting up on it to release the flat PC ribbon wire. Lay the tv back on a soft pillow with screen up, and look on the LCD panel front for and remove the (10) silver screws 1/2" long with an arrow mark beside them. Do not remove any gold colored screws or any without marks. The LCD panel screen can now be lifted off, lift the backlight plastic thin sheeting and thick sheet off to see the CCFL lamps. Stand tv up and plug the ac cord back into the power supply inverter circuit board and plug the power button plug wire back in its circuit board on the LCD black trim panel, and power the tv on while looking at the CCFL lamps. If the lamp is dim or burned out, take the (2) white plastic covers off the side ends of the lamps with a flat screw driver and unclip the lamp to replace it, Check the bad lamp sockets, part # QSOCFA003WJZZ, by putting a good lamp in it and if it lights up the sockets are good and the bad lamp was the problem. If all the CCFL lamps do not light up, unclip the top lamps and move them to differant sockets to the center and the center lamps to the top, if the lamps do not light up, then it is a bad power supply inverter circuit board the ac cord plugs into, part # RUNTKA448WJQZ , cost about $160.00 for new one or less if you buy a used one on www.ebay.com , replace it. If the power supply inverter circuit board is bad to replace it, unplug the (2) wire plugs at the top left side on the circuit board, take (3) screws marked with an arrow out, use a pair of sharp nose plyers and squeeze the plastic white tip holding the circuit board on the right side careful not to touch the high power circuit backlight plugs on the right side of the circuit board. Pull board straight out to unplug it. Replace with new board and tv should power on now.
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on Sep 28, 2011 | Sharp Televison & Video

1 Answer

Sharp Lc-26sb24u white screen with sound


You will get a white screen when you unplug the t-con from the main board. Doing so removes power to the LCD panel. Verify that all of your voltages from the power supply are correct. If they are, I'd look at the t-con board. It sounds like there is a problem with the t-con that is pulling down the main board.

May 11, 2012 | Sharp LC Televison & Video

1 Answer

White screen when I turn it on and only had it for 2 years. It's a Sharp lcd tv model# LC-26SB24U. Please tell me that its a defective part, like the tv tuner signal board.


The problem is that the t-con board is not receiving signal to the logic board or there is no supply coming to the t-con board. T-CON board gets the signal to logic board to produce image in to the screen if T-CON board fails white screen is produce. Try to check if there is a bulge up in the top of the capacitor. Note before opening the back cover of your tv be sure to unplug the unit feel free to send feed back good day and best regards.

Aug 14, 2011 | Sharp LC26SB24U 26 in. LCD TV/DVD Combo

1 Answer

The screen is white with sound


IF YOUR SOUND IS COMING THRU FOR THE PROPER CHANNEL YOU ARE TRYING TO SEE, THEN THE PICTURE IS COMING THRU ALSO, BUT IS NOT DISPLAYING ON THE SCREEN.
THIS MEANS YOU HAVE A TV PROBLEM INTERNAL IN THE SET AND WILL NEED A TV SERVICE REPAIR TO FIX IT. - SORRY

Feb 20, 2011 | Sharp LC26SB24U 26 in. LCD TV/DVD Combo

1 Answer

The tv came on then the screen went black but there was still sound for a sec. Now the green light keeps blinking and the tv won't turn


Unplug the tv for 5 minutes, then try this. Keep holding the VOL+ and CH- buttons down while you plug the tv cord back into the wall ac outlet till you get sound and picture for a second or two. You should be able to turn the tv on and off with the power button now. Next turn the power button off and unplug the tv for a few seconds and then plug it back in and turn the power button back on. Watch the screen and see if the sound and picture comes on, best to check in a dark room to see better, if sound stays on and picture comes on a few seconds and back off you have a bad CCFL backlight lamp in the LCD panel. This tv hads (10) CCFL lamps part # RLMPLA029WJN1 cost $15.93 at www.partstore.com or $19.49 at www.encompassparts.com in it and if one is burned out it will not let the tv picture be powered on till it is replaced. To check and replace the CCFL lamp you will have to unplug the ac cord from the tv back and remove 10 screws holding the back on. With back removed unplug the wire plug on the power button circuit at top left side of the black LCD screen trim, remove 4 screws holding the top of black trim, lay speakers off it, and release trim clips, (4) at top and (2) at bottom with a flat screw driver, and lower the trim to unclip the LED circuit board at bottom left side on the trim. With trim removed, at top of LCD panel remove the (2) PC ribbon wire clips with thumb nail by lifting up on it to release the flat PC ribbon wire. Lay the tv back on a soft pillow with screen up, and look on the LCD panel front for and remove the (10) silver screws 1/2" long with an arrow mark beside them. Do not remove any gold colored screws or any without marks. The LCD panel screen can now be lifted off, lift the backlight plastic thin sheeting and thick sheet off to see the CCFL lamps. Plug the ac cord back into the power supply inverter circuit board and plug the power button plug wire back in its circuit board on the LCD black trim panel, and power the tv on while looking at the CCFL lamps. If the lamp is dim or burned out, take the (2) white plastic covers off the ends of the lamps with a flat screw driver and unclip the lamp to replace it, Check the lamp socket part # QSOCFA003WJZZ by putting a good lamp in it and if it lights up the sockets are good and the bad lamp was the problem. If all the CCFL lamps do not light up, unclip the top lamps and move them to differant sockets to the center and the center lamps to the top, if the lamps do not light up, then it is a bad power supply inverter circuit board the ac cord plugs into, part # RUNTKA448WJQZ , cost about $160.00 for new one or less if you buy a used one on www.ebay.com , replace it and the tv should work ok then.
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Dec 06, 2010 | Sharp LC-32SB23U 32 in. LCD TV

2 Answers

I've only had my LCD TV for 16 months and of course now that the 1 year warranty isn't in effect the darn TV decides to break down. The TV screen is bright white with sound. What is wrong with it? :(


This problems i fix it before,it the Tuner board the main board that take the coalax signal in to get the broscast programs it dead.Tries websites like Shojimmy.com,Ebay.com to buy a refurbish Tuner board for the replacement.Will solved this problems,i experience before.

Jul 14, 2010 | Sharp LC26SB24U 26 in. LCD TV/DVD Combo

2 Answers

Tv screen went blank


sound like the inverter circuit board problem. check & replace back same part# inverter circuit board. hopefully could help!!

Dec 29, 2008 | Vizio L32 32 in. LCD HDTV

1 Answer

Sharp aqous lc 37 in tv power no picture,sound


Your control board seem's defective or the inverter board (associated circuits) are bad. This is common in most TFT-LCD Tv's.......

Nov 30, 2008 | Sharp Aquos LC-37GD6U 37 in. LCD HDTV

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