Crystal Castles sprite problem

Archived from groups: rec.games.video.arcade.collecting (More info?)

Hey guys,
Just acquired a Crystal Castles, but there is a problem with tbe board...
all of the sprites are missing what looks like every other scan line.

This appears to be a really common problem, as there are a number of similar
posts... however, nobody seems to have found a solution yet. Any ideas?

Already tested the sprite ROMs, and they're OK. Swapped the 2128s, no
change. Nothing feels particularly hot. Haven't looked at the schems yet,
but I thought I'd hit the group up for a quickie answer first.

Thanks,
Rob