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probleme pornire tv samsung le26b455c4w

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Buna ziua. Am o problema cu un samsung le26b455c4w, sursa bn44-00291a, placa de baza bn41-01165b.Nu porneste,(nu afiseaza si nu are sunet, nici invertorul nu porneste) ia comenzi din din telecomanda, tensiunile masurate mi se par corecte, Daca scot cablul de alimentare a placii de baza din sursa , abia atunci porneste invertorul, la cuplarea placii de baza inapoi , defectul se manifesta in continuare. Mai precizez ca sursa scoate un sunet ciudat când este conectata placa de baza.

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