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LCD Philips 32PF3321

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Salutare! Am un LCD Philips 32PF3321 sasiu LC4.31E AA care functioneaza normal 5-6 min apoi trece in st-by.,incearca o data sa porneasca, nu reuseste si imi da un cod de eroare pe LED. Daca il pornesc dupa 10-20 sec porneste, functioneaza iar 2-3 min si fenomenul se repeta. Toate tensiunile din sursa sunt OK si stabile. Dupa manualul de service codul de eroare indica nereguli pe bara de 12V. Din aceasta tensiune se "fac" tensiuni mai mici pe placa principala. Am masurat la toate stabilizatoarele pe care le-am putut identifica si sunt tensiuni in regula: 1,8V 2,5V 3,3V 5v 8V. Deasemenea nimic nu se incalzeste in cele 5 min de functionare. Din pacate nu detin un ESR-metru pentru cond. Pe osciloscop nu ar trebui sa se vada ?

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