Some Apollo boards have some timing issues with both the 2B and 1d4 amiga1200 motherboards believe me i know ,,, you may encounter problems such as non boot on cold boot (black screen)or even flaky operation hang etc ... the first thing i would do is too make sure is that the eprom (black legged chip in socket) on the apollo is seated correctly nuber two would see if the jumpers are right .. "do you have the manual ? " also the crystal oscillator may not sit correctly and the last ofcource would be too solder timing fixes on motherboard :-) if possible
