It’s a trivial repair assuming that’s the extent of the damage and there’s not any quirks associated with an extremely complex medical device that has no documentation whatsoever. Like maybe after not having the controller’s power supply connected for such a length of time there needs to be a calibration process upon bringing it back to life that can only be done with proprietary software

The biggest thing though is that by going in and fixing it yourself you open yourself to the possibility that the company will now say “oh this was worked on by someone else and that’s why it’s broken, we won’t work on it now”. That’s the state of repair rights in America, vendors are openly hostile to people who fix their own things even if they do it sufficiently. We used to have political representation that gave us regulations to allow us to work on and even modify our cars without impacting the warranty but that’s been eroded and there’s not really anything of that nature for tech stuff (other than judgements saying broken warranty seals don’t count for anything)