LG 47LN5750/50LN5750 LED two seconds to black
These tv's are exactly the same gut wise. So this is why i use both part numbers in the title.
This seems to be pretty common these days. I read Alastair E's thread HERE about his issue. His test are terrific and had me barking up the right tree almost immediately.
This tv is 13 months old, its a lemon or poor design or both, either way I had to order a new supply for this unit because there was no silk screening on the LED Driver chip at all, or maybe its burnt off. Or I would have replaced Just the chip to test.
Here is the Supply for others reference LG EAY62810801
Front:
Back:
The LED driver chip is the 24 pin SOP in the top left area of the back picture of the PSU. The replacement board i ordered had this chip on it as well, but guess what, it actually has something silk screened on it. Low and behold we have a part number. It's a BD9483F white LED Driver by ROHM Semiconductor.
I will be putting the new board in tonight. I have 100% confidence it will fix the issue. But for any one else, replacing the LED Driver chip i described would probably do just as well, I will test this theory if i get my hands on a proper chip.
I will post back my results for the purposes of others information. And i may order a 5 pack of these chips and replace it on the old supply so i have a spare for when this happens again.
This seems to be pretty common these days. I read Alastair E's thread HERE about his issue. His test are terrific and had me barking up the right tree almost immediately.
This tv is 13 months old, its a lemon or poor design or both, either way I had to order a new supply for this unit because there was no silk screening on the LED Driver chip at all, or maybe its burnt off. Or I would have replaced Just the chip to test.
Here is the Supply for others reference LG EAY62810801
Front:
Back:
The LED driver chip is the 24 pin SOP in the top left area of the back picture of the PSU. The replacement board i ordered had this chip on it as well, but guess what, it actually has something silk screened on it. Low and behold we have a part number. It's a BD9483F white LED Driver by ROHM Semiconductor.
I will be putting the new board in tonight. I have 100% confidence it will fix the issue. But for any one else, replacing the LED Driver chip i described would probably do just as well, I will test this theory if i get my hands on a proper chip.
I will post back my results for the purposes of others information. And i may order a 5 pack of these chips and replace it on the old supply so i have a spare for when this happens again.
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