Need some advice here. So I picked up this 55" off the curb and diagnosed it with bad leds. I opened it up, tested the 4 strips with the tester and yes, 2 strips had burnt leds. I ordered a new set and installed them. But before putting tv back together, I always test tv to make sure I did it correctly. Tv lights up and works, however when turning tv off, the top set of leds remain on. Swapped power supply with identical one and same results. Swapped MB with identical one, same results. So I put the tv back together and reset MB. Tv works fine like new, but leds remain on when powering off. They go off only when unplugging tv.. Im ready to tear it apart again and inspect the led wiring, but any ideas what causes this before I do?
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i think the top LED set which remain on was the one defect at the original one.
Roku TV, android TV, Google TV, they have active circuit at PSU, so when you put the set at STBY , and when you turn it on again you will have direct Home Picture Displaying , this called ( Hot Start )
check at setting or at service menu this point and let it be ( Cold Start ) , if there are no option about this to switch it off, then you have only to DIY the BL circuit at PSU via the Optocoupler to let it BL_ON signal control whole LED BL. -
Or you may have short contact of the top strips set LED - with chassisComment
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Most likely this is the case, the bar is shorted by ground...Originally posted by Diah View PostComment
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