Something that helped me was to change the transponder to 11740 H 4440. There is an NBC feed that pops up now and again on 11730 H 4342 and when it was up, since the RTN feed is so low powered (I even get some bleedover circular signals sometimes stronger) my Pansat would find it instead and display colour bars. Since I changed it to 11740 I've had no problems, and the signal pops in faster than it did at 11736.
Rarely does it show up on a blind scan, but part of the problem is that I am trying to get it 4 degrees off-centre on a 60e dish (couldn't re-arrange dishes/LNBs to get it on a larger dish without major disruptions/signal loss to other satellites). Best I get it is at 30 on the Pansat, which is viewable, but when it drops much (which it does) then it pixelates if too much below 25.