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Trying to fix sons TV Samsung LA40A450C1DXXY CIRCUIT BOARD bn94-02127b
I need a main PCB circuit for a Samsung LA40A450C1DXXY LCD TV circuit board bn94-02127b as I am a retired TV & Video Tech trying to fix my sons TV I have been told that the main board (part BN94-02127B) is no longer available in au and is not supported by the USA for parts or ic's etc? the problem is a vertical flickering red Chroma bar aprox 5 inches wide bar in red hue only (Green colour is fine) and extending from the left hand lcd edge towards centre, however the tv does work with extra heat sinks on ic’s and a fan on the main board to keep it cool I have not yet found which part is in a thermal run away yet and I am trying to get hold of the actual main PCB circuit with a view to repairing it. I have already changed all caps in the PSU inverter board etc and am trying to either replace the main PCB, (but they tell me it is not available in Australia any more) or repair the board by isolating the shorted SMT’s, IC’s or diodes etc? & replace them ,I have tested the LCD panel on another TV and its fine can anyone please help?
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Gidday Zebrock.
Try ebay or aliexpress.
I had a similar problem with a 32" samsung a few months back.
I came accross some spares on aliexpress for a very good price, which were here in no time.
Hope that helps.
Cheers
Ren
Sorry to say I checked the service manual, it doesn't have a schematic for the tuner board.
It's been a few years since I was in the trade, but back in the day Samsung had a few substitute boards that worked in that model. As I'm no longer in the trade I have no way of finding out if this is still the case. But another member here on Austech called CHRISS may be able to help, if he's still an agent for Samsung. He might see this thread the next time he's online or maybe sent him a PM as it will be redirected to his private email address.
The Following User Says Thank You to mickstv For This Useful Post:
BN94-02127B no longer available
Alternative parts information
BN94-02478F IN STOCK FROM SAMSUNG
Chriss
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