Question about Sharp LC-26DV24U 26 in. LCD HDTV/DVD Combo

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LC-26DV24U white screen only

I have a LC-26DV24U that will power on to monochrome white/grey screen and will power off. Except for power button there is no response from any button and no other function. A call to an authorized Sharp repair station said it is probably the "main board" and will cost $200. I have the case open and have read some of your tutorials. Any help or advice?

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The grey screen is caused by failed transistor for the switched 12vdc for the T-CON board, same as my pictures here (my does not have the DVD), but it can also be the main 12vdc itself that is bad, you will have to do some probing. Since the screen is grey, you will not be able to tell if the set really function or not.

Here is the free service manual that you will need:

If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:

Please see my basic troubleshooting guide here:


Please let me know what you find.

Posted on Jul 15, 2010

  • Leonard  Mccoy
    Leonard Mccoy Feb 04, 2011

    Your the best budmrtn!



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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

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I have a white screen I do have sound and can


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

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LC-26DV24U displaying a white screen.

good day the defect is in the main board ,or loose connection in the main board

Jun 20, 2010 | Sharp LC-26DV24U 26 in. LCD HDTV/DVD Combo

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