Hello colleagues, this time I share a solution of the power supply = bn44-00349, it turns out that two televisions of the same model came to me for repair one was totally dead, the tensions in the connector were not present - cnm801 that are marked on one side of the connector, neither did avia voltage in the large capacitors of the primary of the source - cp802 cp801 while in the other source were stamby's [/color[[color=#e74c3c[5.3v and when giving power the normal source was activated and the voltages in the - cnm801 were correct while in the connector - cnl801 had no system of backligth lighting sometimes it was a very low voltage variation, I decided to find the fault in this second source I proceeded to check the integrated circuit selc2010 which was not being fed or had a voltage variation at the power input with At that ic https://www.datasheetq.com/search.jsp?q=SELC2010, the track where this voltage came from and tracked up its way to the optocoupler - pc803s from here it calls something abnormal because it was continuity between its pins 3y4 following up on the tracks of this optocoupler I realized that the ic marked on the board as um801s q0765r s and I saw it as busted, it was taken as soon as I unlinked it from the circuit but there were still more damaged components finding the shorter zener zdm801 there were still more elements co n leakage and short following leg three of the ic q0765r voltage regulator took me to the zener diode zdb804 that the transistor qm801 also shorted the diode db804 leaking and continued checking that there were no more damaged components before replacing these parts, the two sources were almost with the same fault only one had more problems than the other in one the following pieces were damaged um801s = q0765r, zdm801, zdb804, qm801 = d1347, db804 and the other source damage um801s = q0765r, zdm801, qm801 , fb801s the zener diodes zdm801 and zdb804 replaced them with 15v zener the db804 I replaced it with a normal surface diode that I took from another board, well folks, I hope this solution will serve you one that encounters the same problem. I wish all the best of luck