Question about Sharp LC26SB24U 26 in. LCD TV/DVD Combo

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Sharp lc26sb24u white screen should Q413 transister be hot when powered?

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My Sharp HDTv LC26SB24U is showing a white screen, how do I fix this and what is the cause of it.


Absence of processed video signal.
Check and replace the damaged component/s at its main board. Contact any service technician. 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/

Aug 10, 2014 | Televison & Video

1 Answer

My sharp LC-26DV24U is displaying a white screen only.


I have the same model Sharp TV with the same symptoms. The TV would sometimes work perfectly, then go to white screen (audio OK) and sometimes back to working perfectly again.

I saw Posts saying to check F404 and Q413 - My fuse F404 was not blown, and replacing the Q413 transistor did not fix it.

On Q413 I had about 12.4 VDC on the Emitter, 12.3 VDC on the Base and about 1.5 VDC on the Collector. My service manual called for 11.6 VDC on the Base lead. As a Test, I used a 150 Ohm resistor from Q413 Base to metal chassis ground, and that made the TV work OK.

I replaced the Q419 NPN silicon driver transistor, and now the TV has been restored to 100% proper operation.

I hope that helps someone else down the line.

Mar 27, 2012 | Sharp LC-26DV24U 26 in. LCD HDTV/DVD Combo

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

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

4 Answers

I have a white screen I do have sound and can


YOU MAY USE RADIO SHACK TIP31 TRANISTOR PART # 276-2017 IN PLACE OF KTA1281 COST $1.79 WORKS FINE

Jun 21, 2010 | Sharp LC-26DV24U 26 in. LCD HDTV/DVD Combo

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