So... once I escaped the Discord, I was actually able to get a little work done...
Here the lens assemblies are, side by side, and things do look a lot better on this one.
Well, until you look a little closer.
Now, not so good.
But... backlighting with a flashlight doesn't show any actual breaks... Hmmmmm.
I think I've found the culprit.
This loop of the FPC is supposed to be held fast by pegs in the lens body, but they don't stay put and no adhesive was used. Unlike the other end, this area is not held in place by other parts pressed against the FPC.
The mass of the connector and all appears to be enough to pull it loose, and I can see it wiggle just by tapping gently. So pretty much from day one, any vibration is translated into movement concentrated right where the FPC is folded over itself, a natural weak point.
If I were cynical, I might think that were deliberate to ensure turnover.
Here I've stabilized this part of the FPC with a drop of CA and accelerant. Not pretty, but at least I should be able to handle the lens assembly without a repeat failure. Maybe I'll even be able to confirm continuity.
mnem
*tinker-ily*