On an Amiga forum I discovered that two electrolitic capacitors on the CD 32 motherboard are factory installed the wrong way around. It might help shorten the life of these capacitors and get them to leak. Leaking can lead to serious damage to the motherboard. So I opened my CD 32 to see this:
As you can see they don't look very nice: bulged and about to leak.
I took the solder iron and replaced the bad capacitors with new ones, ensuring they are the other way round as shown by the silkscreen. The CD32 still works fine.