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defect sony

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buna ziua am un sony model KV29C5D sursa STR-6654,TOP-209P, proc SAA-5497PS/234, mem393N, TDA-9870A, CXA-2060BS tv-ul era pe o terasa si dupa o furtuna nu mai functiona sonor avea si daca am marit G2 se vedea foarte slab cursa inversa pe fond albastru ,dupa verificari am gasit defect D629 intrerupt pe pinul 5 a integratului TOP-209P,am schimbat dioda cu BY299 navand UF4005 si surpriza tv-ul nu mai pornea deloc.Rog ajutorul celor care cunosc acest defect

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rog ajutorul celor care stiu sa raspunda de ce porneste tv-ul cind scot dioda d 629 de pe pinul 5 a integratului TOP209 ,cind pun dioda la loc in bloceaza sursa nu mai am nici 300v in primarul sursei,de 4zile lucrez pe defectul acesta am scos piesele una cite una din sursa am masurat, numai D 629,si d613 am gasit defect, le-am schimbat ,am schimbat si TOP209 dar nici o schimbare

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