I don't think I was much help but I am happy to hear that it is working again
If you got it working by tinkering with the trimmer with the module in the case maybe you moved the module slightly, enough to clear the inner contacts, if it happens again it might still be worth checking this - just a hunch based on my limited tinkering experience.
I have a Hughes module which lights up all the time both in the case and out of the case, tried a bit of tinkering, cleaning up the traces etc but no joy.