By02vbps Manual !new! Official

| Symptom | Likely Cause (per manual) | Solution | |--------|---------------------------|----------| | No output, LED off | No input power or internal fuse blown | Check input source; replace fuse (spec: 250V 2A slow-blow) | | Output voltage fluctuating | Loose ground connection | Tighten terminal screws; use ferrule on stranded wire | | Unit clicks repeatedly | Output short or capacitor pre-charge failure | Disconnect load; power cycle; if persists, RMA |

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