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TR 23 is the main regulator - Do you have voltages on TR23? If two legs of it, go to zero, Stop! You have a short somewhere, save the TR23 if you can.


Restart your "Hey looks like a cap shorted" hunt, like at C114 and C119.


Check the branch off of TR23 - it even goes to the 5 VDC regulator for the PLL chip too...at C114


D21 can be suspect too, but you'd have strange results with that part...