bilakos10
(bilakos10)
8
Most probably a solder joint has cracked.
Especially the joints that join the two pcbs together are prone to such problems.
As already advised, you can go ahead and reflow everything.
It’s also possible that the connection of the emitter to the star is broken.
Try to power the emitter by directly connecting the battery to the star’s pads.
If you get no light, then you should go through a reflow.