Delta DSP 400LB A Sony PN #1-468-851-14 power supply

Delta DPS‑400LB A is a 12 V industrial power supply used in Sony Vaio desktops and other Delta‑controlled equipment. Common failure modes include electrolytic capacitor degradation (visible bulging or leakage), fan motor burnout, output voltage drift due to MOSFET or regulator damage, and shorted switching stages that trigger protection shutdowns. First‑check diagnostics: verify input AC voltage and polarity, measure the 12 V rail with a multimeter for correct regulation, inspect the board for burnt components or swollen capacitors, and review any error codes or LED status indicators on the host system.[oss-gpt-20b]

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