Hi
@lolo780
Looking at the controller board there would appear to only be 4 likely components that could be load resistors and could in theory be "blown" if the board senses a short circuit or charging fault and wanted to stop power going out from the cells. I have access to a good board and measure a 0 ohm resistance on the two marked "R004" and a 100 ohms on the two marked "101".
Are you able to measure your bad board and let me know. I did all measurements with out de-soldering and components.