I feel rather ashamed to write this, but I registered here as this thread helped me to fix my th42pz800B - it was that little 0.1uf Capacitor that gone wrong, as the resistor test on the module booted the TV.
I am under no circumstances an electronics engineer - I know some basic things and I also had a spare power board for the tv (friend of a friend that did not need it - it had corner of PCB broken off, so he just considered it junk and I thought I will get to salvage some parts), and ended up fixing up the broken link by gluing piece together and soldering the trails by hand (don't ask - it just seemed easier than deal with that SMD capacitor).
Scrap board fitted, and Voila, the TV worked! ...for around 20 minutes.
I decided to check Vsus/Ve values (as recommended by the manual upon board replacement). Ve seemed fine, while Vsus would not give me a rating on my multimeter - it would just constantly throw random values between 0 and 500+. I decided that maybe my multimeter is jerking around, so I just picked another one I had lying around (DT830B), and decided to check voltage with this. Alas, I did not realize that one of the probe leads was connected to the 10ADC socket instead of the one for Voltage etc., and upon touching the TPVSUS on SS board, spark and a loud bam ensured, turning of my tv set.
Right now, the TPVSUS test point has a small nice black crater, and TV return 2 blinks upon powering. Following the test procedure, the pin 1 on P board shows around 20k to 40kOhms (I swear my multimeters are dodgy), so I am not sure if that is a short.
Could someone explain to me, what happened? Is it possible that only the diode (That's a diode, right?) on the test point is gone? Do I need to replace both SS and P boards? (Well, I have a P board with the MC201 capacitor problem, so that's not that hard to get, but could the SS board short out the new P board as well?)
EDIT - After checking the board in the morning, I realized that it is more embarrassing than I thought - I actually used TPSS1 instead of TPVSUS test point.. So I guess SS board is dead? what about the Panel itself? is there a chance I destroyed it?