[YamahaFreak]

I checked again in total darkness for any sign of panel glow...definitely none. I believe I have located, on the YSUS board, where I am supposed to measure the Vscan, which was the last voltage to measure if I recall. (Photo attached) Just to be safe, I'm asking once again where exactly my probes are supposed to go. :P (Across the cap, or across that string of resistors?)

EDIT: Checked Vscan voltage across resistors and got the correct 133 volts. I also pulled the buffer boards (XL, XR, XC) and checked visually for anything fried/burnt, and all looked good. (Are the buffer ICs the rectangular units embedded in the ribbon cables? There are 16 of them, one for each cable!)