OK - It appears I've "fixed" my Panasonic TH-PZ46850U Plasma with the 10-blink problem. I just ended up removing that bad (microscopic) capacitor on MC201 (in place .. I did *not* remove the power supply board). When I powered the set up and it worked, I decided to leave well enough alone.
To get the bad cap out, I first bent the tiny MC201 sub-board on the power supply board to the left until it was perfectly perpendicular with the power supply main board. For some reason, it came from the factory bent about 30 degrees to the right of perpendicular, and with other capacitors nearby, I didn't think I could get the soldering iron in there successfully without damaging something else. Next, I put the TV on the floor standing on its left side. I did this because now the tiny MC201 sub-board would be sitting horizontal (parallel to the floor), which made it easier to work on. Next, I put a dab of solder on the cap's outer-edge connection (don't ask my why, but NorCal did this before removing his cap - maybe it spreads out the heat load from the iron???). Then I put a 90-degree angle pick on the back edge of the tiny bad cap and applied pulling pressure toward me, while also applying the 15-watt soldering iron to the cap to break it free. With the capacitor removed, the set came up and ran fine this past weekend.
Why does the set run with the capacitor removed?? Beats me. My guess is the circuit prefers an open connection here and the cap failed closed?? I dunno. Will I eventually install the replacement capacitor? I have it, but I don't think I will install it. WAY too small of a soldering job and I think I'd just end up causing another problem. If the problem comes back, it'll probably be the same capacitor failing on the MC301 board. Then I'll do the freeze test again to confirm, and remove that cap, too!