I've just had a conversation with a friend about his Q840av - which sounds quite quite different to mine, while still being an 840av.
For starters, the motherboard in mine looks like this:
and there's another link to one similar (but not quite the same) at
Now the difference comes with my friend's one, which has the 68040 and some of the other components up on a daughterboard running parallel to the motherboard, has quite a few more components packed onto the motherboard (mine is bare in comparison) and also has a -68040 PDS slot- (no connector soldered in, but the number of pins and spacing matches one) above the 3 NuBus slots. The position of RAM and VRAM is different to mine as well. and the battery is in a different place.
Anyone else know of revisions of 840av's that differ so much? It's got me curious =).