The MSW‑100 DM2030 hand‑dryer board is a compact industrial controller that drives the motor and manages user input via a touch or button interface. Common failure points for this class of boards include burned or cracked power MOSFETs, damaged capacitors on the 12 V rail, and shorted I/O lines to the dryer’s switch or sensor array. Additionally, firmware corruption can cause the board to lock up or fail to start the motor. First‑check steps: verify the 12 V supply voltage and continuity to the motor driver; inspect all surface‑mount components for visible damage or corrosion; and review any diagnostic LEDs or serial log output for error codes indicating a failed sensor or over‑temperature condition.[oss-gpt-20b]