Hey guys,
I currently have a Samsung UE46D5000 which shows no reaction at all. There's no Standby light and no clicking noise. Already replaced the PSU, because the old one seemed faulty (no STDBY voltage, no other voltages), but it didn't change much.
With the old PSU and disconnected mainboard the backlight did flash on and off. With the new (used) PSU and disconnected mainboard the backlight stays on.
When I connect the mainboard the backlight turns off and the TV seems to be shut off.
I tried to jumper the PSU (PS_On and A5V, which seemed to be 5V_SB), but this killed a small Transistor. The PSU still works.
I found a damaged double Z-Diode (for the CI) on the mainboard and soldered it out.
When everything was reassembled I checked the voltages again. The PSU seems to start and delivers all the Voltages correctly to the mainboard, but the IR/Button-board doesn't get any Voltage. It should have 5V(A5V) but instead this pin is shorted to ground. Í guess it shouldn't be shorted.
Any ideas where to search the fault? I was not able to follow the traces of A5V from PSU to A5V IR board. They have no direct connection.
I currently have a Samsung UE46D5000 which shows no reaction at all. There's no Standby light and no clicking noise. Already replaced the PSU, because the old one seemed faulty (no STDBY voltage, no other voltages), but it didn't change much.
With the old PSU and disconnected mainboard the backlight did flash on and off. With the new (used) PSU and disconnected mainboard the backlight stays on.
When I connect the mainboard the backlight turns off and the TV seems to be shut off.
I tried to jumper the PSU (PS_On and A5V, which seemed to be 5V_SB), but this killed a small Transistor. The PSU still works.
I found a damaged double Z-Diode (for the CI) on the mainboard and soldered it out.
When everything was reassembled I checked the voltages again. The PSU seems to start and delivers all the Voltages correctly to the mainboard, but the IR/Button-board doesn't get any Voltage. It should have 5V(A5V) but instead this pin is shorted to ground. Í guess it shouldn't be shorted.
Any ideas where to search the fault? I was not able to follow the traces of A5V from PSU to A5V IR board. They have no direct connection.
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