Samsung UE32F4510 Red led blinking

[Davi.p]

you did not well things, if backlight comes on on the last test then you have to check also main board psb outputs, if them ok then is highly difficult that jumpering A5v to power on did not turned outputs on.. THE QUESTION: have you ever tested a tv power supply?!

[electrocuted]

Good news!!! the tv works with shorted DS on mosfet. I guess the noise is not harmful... what happens if I make the short permanent?

[Davi.p]

So it's bad circuitry prior the mosfet, no you cannot make the short forever

[electrocuted]

ok thanks, I'll look into that

[electrocuted]

Well, congratulations to both of you, it was a cold soldering on the negative pin of CM851. I guess this was "informing" power supply that the led inverter was operational and it would not turn on. Thanks again for the help!

[nomoresonys]

[electrocuted]

This is the spot that was faulty!

[vinceroger69]

Glad you managed to fix the tv in post 18 i mentioned might be a bad solder joints some are certainly hard too spot expecially when were diagnosing over pictures

[electrocuted]

Thank you too, I just could not believe that it was something simple as that!

[nomoresonys]

Yep, the one time I didn't give the solder joint speech early, that's why the simple things should not be overlooked. Would have been a shame to tear down to backlights and or buy a new powerboard, just for a bad solder joint that's fixed with a quick check and a little solder.

[electrocuted]

I hear you, next time I will surely know where to start from...