I don't think you can get a definite answer to those questions. The timing fixes *might* fix incompatibilities between the Apollo and the IDE-Fix Express, but it could also be down to how either of them work, in which case they may never work together...
Likewise with the video out, it could be dead capacitors, could also be another faulty part or some dry solder joints. Hard to know really without doing some more diagnostic work with a scope and some patience / luck...
