Why does sips keep failing

I have Samsung TV model UN55JU65000 FXZC. It is little over 4 years old. One day it suddenly shut itself off, and would not turn on, but standby light kept flashing. A TV repair tech said the SMPS has failed, and he said he has replaced it. TV worked fine for a month and then exactly same thing happened, perhaps SMPS failed again.

Why would this happen,? Is there something the repair tech is missing?

I would highly appreciate an opinion to guide the tech.

Thanks

Jagjit Khosla

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Hi Jagjit Khosla

Other than power board, there is another component, which is the mainboard.

Just sharing my experience for my other samsung repairs, power board tested okay, as I had swapped with a known working one and the board also work.

Found out is the mainboard which one of the voltage regulator has failed which cause this not booting up.

完成的

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