Panasonic TNPA1300 TV power supply board

Panasonic TNPA1300 is a TV power‑supply board (TXNP110N98) that steps down AC to the multiple DC rails required by the mainboard and T‑con. Typical failure modes on this class of boards include damaged capacitors or electrolytic bulging, shorted MOSFETs/IGBTs, and degraded rectifier diodes, all of which can cause no power or intermittent startup. First‑check diagnostics: verify mains input voltage and polarity at the board’s AC inlet; measure output rail voltages (e.g., +12V, +5V, –15V) with a multimeter; visually inspect for burn marks, cracked components, or swollen electrolytics before proceeding to component testing or replacement.[oss-gpt-20b]

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