Firefly 2.0 - Kickstarter - needs repair

[SixStringSimian]

Hey everybody, I have had my firefly 2.0 tucked away for a few years and my daughter found it. She dropped it and it will not work now. I would like to see if anyone knows how to repair this?
new battery? Check
changed switch? Check

I don't see anything obvious, so my guess is that it is the bad solder issue.

if I cannot repair it, I'd like to sell it.
blue trites,
all spare parts included from campaign - seals, lens, gaskets.
Repair is preferred!
thank!