The Digital Concepts ME74T‑2B is a lower‑motor control board used on True Fitness 350HRC and similar treadmill models; it regulates motor speed, torque, and safety interlocks via the main controller. Common failure points for this class of boards include burned or tripped MOSFETs/IGBTs in the drive stage, damaged gate driver ICs, and degraded capacitors on the power supply rails, often due to thermal cycling or over‑current events. Initial checks should verify that the board receives correct input voltage (typically 24 V DC) and that all connectors are seated; inspect for visible burn marks, cracked solder joints, or swollen electrolytics. Next, use a multimeter to confirm continuity of the MOSFET channels and test gate driver outputs against the microcontroller logic levels. Finally, review any error codes displayed on the treadmill console (e.g., “E‑12” for motor fault) and cross‑check them with the board’s diagnostic LEDs or status indicators.[oss-gpt-20b]