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Udv tanyalakok!Behoztak egy Samsung TI-14C3DF tipusu tv-video combo-t,UK.telepitessel(csak UHF savot hangol a tuner).Erdekelne hogy service-menu kereten belul van-e lehetoseg aktivalni a VHL VHF savokat es a menube valo belepes modjat. Elore megkoszonok minden faradozast.

Hi, my SAMSUNG UE40D5000 tv doesn' t work anymore. The red led light indicating that the tv is plugged is not powered when I plug in the tv. The original power board modem is BN44-00473B. I have checked the voltage on the connector to the mother board of the tv, and it was 0 instead of 5.3V or 13V on the different pins, with the fuse still working and no obvious overheated part on the power board and no bulging capacitor seen neither.
I have then changed the power board with a used one bought on ebay, which model BN44-00473A is said to be compatible. It has then worked perfectly 2 days until yesterday. This morning I had to move a little bit the tv, what I did very gently, and got really disappointed as I plugged it and didn't see the red led light on anymore.
Since this morning, the power board seems to be broken once more ( I have moved from my original flat 1 week ago and don't have a multimeter to check once more that the fuse is ok and what are the voltage on the connector to the mother board )
I am wondering if this new power board failure is just bad luck, 2 days after receiving this other power board circuit ( that is a used unit, not brand new) or if the mother board could have damaged it. In the first case I would send the power board back to the seller, otherwise I will probably give up as I don't have time and skills to repair the tv.
My question is : do you think the mother board or another unit connected to it, can damage the power board ?
Thanks for your help and answers ! 

Sziasztok Adott a címben szereplő tv.Bekapcsoláskor a készenléti led villog,néha beindul a nagyfesz ,de csak egy pillanatra,aztán tovább villog a led ,valamikor újra próbálkozik és bejön a kép ,hang,de kikapcsol. STRX6750 CSERÉLVE ,ELKOK cserélve,forrasztások átnézve az eltérítő panelon is.A digitális panelon lehet a hiba? HELP!!!

Sziasztok! Került hozzám a felvezetőben említett készülék amelynél a kép erősen brummos. Elkókat átmérve kapacitásmérővel jónak tűnnek, szemre a sasszin látható hiba nincs. Itt leakadtam. Jól jönne egy segítő lökés, mert már lefáradtam. Ügv.Ckó