Uploaded October 2025 | Updated September 2026, 1 week ago

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Repairing an AC/DC adapter for a travel fridge. This time it was just a simple problem, one of the most common failure modes of a flyback switching power supply. Very easy to find and fix.

The Fnirsi multimeter:
fnirsi.com/products/dmt-99?sca_ref=9216013.ntkg5GeG0R&utm_source=af&utm_medium=ref&utm_campaign=9216013

The Fnirsi internal resistance tester:
fnirsi.com/products/hrm-10?sca_ref=9216013.ntkg5GeG0R&utm_source=af&utm_medium=ref&utm_campaign=9216013

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