A-Star Power Supply Power supply board Repair Service

A‑Star power supply boards (e.g., LTV‑32ASB FSP205‑5E01) are the main AC‑to‑DC converters for mid‑size LCD/LED TVs, providing regulated +12 V, +5 V and sometimes +3.3 V rails to the logic board. Common failure modes include electrolytic capacitor leakage or bulging (especially on the high‑voltage side), damaged bridge rectifier diodes, burnt transformer windings, and blown main fuses; these symptoms typically manifest as no standby light, a dead power LED, or erratic video output while audio remains functional. First‑check diagnostics: verify mains input voltage and polarity at the board’s AC inlet, test continuity of the main fuse and bridge rectifier, and measure DC rail voltages with a multimeter while the unit is powered on; visually inspect for burnt components or cracked PCB traces before proceeding to component replacement.