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If the set it latest model, the T'Con board is a built in panel type, and can't replaced. You should replace the display panel.
If you wish to get some details; visit the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/
Fault with its main board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/ . In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.
It sounds that the power-ON signal do not come from its main board. It will be best to contact any service technician. Troubleshooting main board is a skilled work. To get some details, http://electronicshelponline.blogspot.com/ Pull up older posts.
There is a direct short circuit in the circuit board. Normally, the fault should be with its main power supply regulator board. You must have sound knowledge in electronics to follow. If you are not experienced, get it repaired by any experienced service technician.
I have the same issue. I'm looking for the power supply schematic. Some components are dead (like U501 and ZD501). I'm looking for the reference of the zener. Does any body have the schematic or the part list of the board (ref PSPF501B01A) ?
it unusual to have the screen go faulty itself. With plasma screens what goes is a power transistor, and there are 3 or 4 of these on one of the circuit boards. The likely board is the one with the big heat sinks as the power has to be stepped down to a lower voltage before it can be used properly. It is best if you replace all of the power transistors as one may have affected the other. If you are no good with a soldering iron then either get someone else to do it or replace the whole Circuit Board (PCB). Beware there are plenty of people aching to make a quick buck out of people who have no knowledge on this technology. If you want someone else to do this for you then find someone honest. A telltale sign for the power transistors is that they sound a pop when they go faulty. A symptom is a blank screen sometimes showing on standby mode. I would say your screen itself is ok, so sell it on to someone who needs to replace a physically damaged/smashed one if you no longer need it.
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