Noticed a similar repair attempt post in these forums and thought I'd give it a shot and ask for some help. I had a functioning massage gun yesterday before leaving it to charge with the main switch left on (not running though. back screen showed what looked like a charging animation). Came back today and it was all off, no screen, no lights, nothing. Power brick seems fine (have checked with multimeter - approx 5v), although battery voltage only measures ~6.1v. Not sure how many batteries or if there is a boost somewhere but assume it should be feeding the motors etc 24v as labelled. Any suggestions on what could be wrong / how to confirm? Can't see anything fried on the board itself (have included photos).
Cheers!
Cheers!