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Tv lcd samsung defect


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Va salut cu respect.

Am pe masa un tv cu-n defect care-mi da de cap.

Este vorba de un samsung lcd model le37a550 , cu sursa bn44-00216a, main bn41-01019a (mt8226 ready).


Simptome : tv face on/off din telecomanda, reactioneaza ledul la telecomanda. Am toate tensiunile in sursa (5v on, 3.3 stby, 12v, 5v, 24v inverter).

Sunet nu exista (am bagat scartul si stiu ca astea trec singure pe video ?! Am tot apasat si pe input).

Pe inverter nu exista comanda on (0v on/off).

Am gasit un cond la prima vedere umflat in sursa si i-am schimbat pe toti. Invertorul pare in regula dar nu primeste comanda on. Si nici sunet nu exista.



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Am scris si dumpuri, am pornit tv-ul si fara memorie si are acelasi comportament : clipeste ledul la pornire apoi se stinge ca si cand tv-ul a pornit, inverter nu primeste comanda on, nu exista video sau sunet. Toate tensiunile pe sursa sunt perfecte. Tv reactioneaza la telecomanda, intra mai greu in stand by (apasari succesive ale buton power Rc).

Daca scot cupla inverter, ramane backlight aprins..nu exista video sau sunet.

Mai are careva vreo idee?



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