Gentleman:Got a fun one here....
TV,when turned on will try for about 20 seconds to startup.
In that time you can see the backlight is flickering erratically as in trying to turn on.After about 20 sec it gives up and goes into SOS1=backlight failure.
Now,when I opened her up,I saw cap C7829 being bulged and being REVERSED polarity on the board!!! No sign of it ever being soldered.!
I replaced it,polarity correct this time,no change....
I did a lot of tracing the board and measuring and I'm getting some fluctuating voltages in the 12v line(11.9 v to 7.2 and back etc) Even with 7.2v it will still try to turn on backlight.
Voltage to inverter coils,according to schematic,should be 34v,I'm getting 2.4v max.
Anyways,before getting carried away into the power supply,I would like to ask the pro's here,how to force the power supply on(with inverter) to eliminate a mainboard problem.
Pic#3 shows the pin out for plug between PSU and main board.
Do I jumper between pin#1&pin#13 or #14 or both? Resistor needed?
Once I can force PSU on I can trouble shoot a little better(20sec time frame gets annoying after a while,lol)
Hope you can help
Tom's SM:
http://www.toms-service-manuals.com/...h=Submit+Query
PSU:TNPA5123
Main:TNPH0856
TV,when turned on will try for about 20 seconds to startup.
In that time you can see the backlight is flickering erratically as in trying to turn on.After about 20 sec it gives up and goes into SOS1=backlight failure.
Now,when I opened her up,I saw cap C7829 being bulged and being REVERSED polarity on the board!!! No sign of it ever being soldered.!
I replaced it,polarity correct this time,no change....

I did a lot of tracing the board and measuring and I'm getting some fluctuating voltages in the 12v line(11.9 v to 7.2 and back etc) Even with 7.2v it will still try to turn on backlight.
Voltage to inverter coils,according to schematic,should be 34v,I'm getting 2.4v max.
Anyways,before getting carried away into the power supply,I would like to ask the pro's here,how to force the power supply on(with inverter) to eliminate a mainboard problem.
Pic#3 shows the pin out for plug between PSU and main board.
Do I jumper between pin#1&pin#13 or #14 or both? Resistor needed?
Once I can force PSU on I can trouble shoot a little better(20sec time frame gets annoying after a while,lol)
Hope you can help

Tom's SM:
http://www.toms-service-manuals.com/...h=Submit+Query
PSU:TNPA5123
Main:TNPH0856
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