Radius Power 1410110250 is a lower‑motor control board used in Cybex Sport + 515T treadmills and similar exercise equipment. Common failures include burnt or tripped protection diodes, failed MOSFETs or driver ICs, and degraded power supply filtering components that cause erratic motor behavior or loss of communication with the main controller. First‑check diagnostics: verify input voltage and ground continuity on the board, inspect for visible burn marks or swollen capacitors, and read any diagnostic LEDs or error codes displayed by the treadmill’s main console. If these checks are normal, test the MOSFET gate drive signals and measure output currents to confirm proper motor driver operation.[oss-gpt-20b]