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First test, unhook cable from powerboard to mainboard, plug power cord in, see if backlights come on and stay on, need at least a focused picture of each board and one of the whole back including all the boards.
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You know what the whole difference between these are....the screen size that's ALL....
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If you can verify the backlights are ok it may be the eMMC, there Nick did your same model, they remove and test it, symptom is not the same as yours, but it could still be the eMMC: [URL]https://www.youtube.com/watch?v=dlA0umUzbVk[/URL]https://If you can verify the backli...0umUzbVk[/URL]
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Since things acted the same, maybe keep original mainboard in for testing.
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Something to try, heat up looks like C205 500 volt capacitor for a minute or so with a hairdryer, try tv, see if there's any change, don't wait til it cools down, try it while it's still hot.Last edited by nomoresonys; 03-10-2024, 08:05 PM.
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So you're saying when you turn tv on you can see the backlights are on, can you very carefully check the dc voltage of looks like C611 the 460 volt capacitor put a probe on each lead, use CAUTION it could be about 400 volts, so watch where you put your hands, you don't want that going thru you, don't do if you're uncomfortable with this kind of testing.Last edited by nomoresonys; 03-10-2024, 07:59 PM.
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We no longer help people who do not post pictures... maybe that's just me.
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You have the answer, you are NOT going to reinvent the wheel, if the diffuser is melted it's junk and needs replaced, this video shows the upgraded diffuser. Do a search and see where you can get them, the end: [url]https://www.youtube.com/watch?v=sawYS2pWS5k[/url]https://You have the answer, you are...YS2pWS5k[/url]
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Not positive but it seems these models can have have problems with components on panel driver board, maybe a defective diode pack, resistors or the like, can do some testing. Maybe check youtube, could try a search here possibly for bad diode pack or such, that's if this model has those packs, some don't.
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Gave you the simple solution in post #4, tv menu backlight setting is it 100 put it less than 50, 20 put it less than 10, never have it on vivid or whartever they're calling 100 percent, if left on 100 or whatever the max is will burn shit up every time....Last edited by nomoresonys; 03-07-2024, 06:21 AM.
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