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SMPS out put flickering

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ismu

ismu

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in my Tecktronics TDS100c model internal SMPS is from Emerson , it has been damaged , its TOP244yn IC is gone bad[smoke is there near] , so i replaced with new one , after that out put is coming 3.3v but it will on at 2sec and off at 2sec and repeating ,i didnt check other sections may same issue ., what should i change .see the picture ..
 

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