Samsung qe50q60Tau t con problem

[Dave03]

Hi everyone so sorry my bad english Im hungarian
so I have a few samsung qe50q60tau and I trying to repair t con problem, I have a 100% working main board 100% working psu for the tv for another tv I replace them boards for the wrong tv and the problem was same so the problem not the main board and not the psu, the back light is working
I turn on the tv the qled logo is blinking turn on and off the tv I tried to tape the t con cable and I found the right pin for the tv is stable turned on but no picture, no qled picture only back light and not arrive the currrent for the t con board 3,3v ok, 1,8v ok and other litle currents but the maybe Vcom current is not arrive. (12v?) when the qled logo is blink I measure this point 6,9-7V.

[William1967]

This TV does not have a separate T-con, it is built into the mainboard. Does the standby LED flash when you turn on the TV? If so how often?

[William1967]

This TV does not have a separate T-con, it is built into the mainboard. Does the standby LED flash when you turn on the TV? If so how often?

[Dave03]

The standby led is turn on when the tv is turning on the tv is turned on the standby led is turn off. The tv is turn off and aggain turning on the standby led is triggering and the tv is turn on the standby led is turn off.

[Storyteller12]

Sounds like a panel issue. Possibly the diode pack on the buffer board.

[Dave03]

The standby led I want to attach video from my standby led it s so difficult to write down hows blinking how I can attach video?

[Dave03]

I found 1 problem in the vss test point measured the good tv this point in diode mode OL but the bad tv I measured 1,05V opening voltage I measure this point the resistance the bad one is 1k the good one is 0 and the good tv in working make -4,21V this vss point and the bad is 0V the problem was the vss line.