Model # 50UX57B Chassis # AP83R, was worked on elsewhere! Both
convergence IC's were replaced, & I found D910, & D911 12 volt zeners
in the SMPS shorted. E995, & 996 fuses were replaced. I replaced the
SMPS IC regulator. All the pico fuses, & fusible resistors are ok.
Nothing looks overheated. Nothing else is bad, that I can find!
Nothing is dragging down the secondary of the SMPS, but it just won't
oscillate! All the capacitors in the secondary, & primary of the SMPS
check out fine! Anyone see this type of failure, in this unit? Thanks,
Dani.

Changed the optocoupler yet?

Leonard

"Dani" wrote in message
oups.com...
Model # 50UX57B Chassis # AP83R, was worked on elsewhere! Both
convergence IC's were replaced, & I found D910, & D911 12 volt zeners
in the SMPS shorted. E995, & 996 fuses were replaced. I replaced the
SMPS IC regulator. All the pico fuses, & fusible resistors are ok.
Nothing looks overheated. Nothing else is bad, that I can find!
Nothing is dragging down the secondary of the SMPS, but it just won't
oscillate! All the capacitors in the secondary, & primary of the SMPS
check out fine! Anyone see this type of failure, in this unit? Thanks,
Dani.