Though our robot in 2019-2020 FTC Game, Skystone, was stationary during its first match, we successfully diagnosed the problem! One of the REVhubs was fried due to metal shavings, so we had to switch the wiring for driving onto another REVhub on the robot. After match 3, we replaced the broken REVhub with a spare one, and re-wired the arm on it. In the end, our arm, intake, and driving were working!