I've finally found time to open my A1000 and install my combined IDE/Ram board this weekend. Unfortunately my machine does not boot at all (black screen) with the board installed. After trying a few times I was curious if the included MC68HC000 could be the culprit so I tried just the MC68HC000 without the IDE/Ram board and it didn't work either (black screen again). After that I've tried my original cpu with the IDE/Ram board, but unfortunately that didn't change anything. When I revert back to just my original cpu without the board installed the machine runs fine so it seems the board and MC68HC000 are dead. I'm a bit puzzled how that happened since I always wear an ESD wristband when working on hardware.