Spellman HVPS 7681 is a precision DC high‑voltage power supply integrated into GE Lunar Prodigy X‑ray generators and similar industrial imaging systems. Common failure modes for this model include degradation of the output capacitors, failure of the MOSFET/IGBT switching devices, control board logic errors that trigger over‑current protection, and loss of ground reference leading to unstable voltage output. First‑check diagnostics should verify the supply’s input voltage and isolation, inspect the output capacitor bank for bulging or leakage, and review any fault codes from the unit’s diagnostic interface; a quick continuity test on the control circuitry can also reveal open traces or blown fuses.[oss-gpt-20b]