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If this set was indeed a lightning victim...then the first thing you need to do is see if you are getting any standby voltages off of that power supply board.
With the power cord plugged into it (and the board out of the set for convenience)--do you see any sort of voltage on that 12 volt line on the power supply ? Since your set appears to use the SMPS all of the time for power even in standby --there definitely MUST be some voltages from it even when the tv is not on --but plugged in. Likely a 12 volt line, maybe a 5 volt line, maybe that 21 volt line. All are referenced to cold ground. near the middle of the supply picture--there are 2 capacitors. Above them is a heat sink. Is there any appreciable voltage on these caps? There should be in standby.
If you get NO standby voltages--then the switcher control chip has likely been taken out. Can't tell for sure--but looks to be the part on the other big sink--below the "live" symbol, and above the 820 uf cap.
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