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SONY STR-KM5500 Multi Channel AV Receiver Owner’s Manual — questions & answers

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How do I fix the 'PROTECTOR' warning on my Sony STR-DH550 AV receiver when standard reset methods fail?

2026-05-15 1 answer

The "PROTECTOR" (or "PROTECT") warning on Sony AV receivers like the STR-DH550 indicates that the unit's safety circuitry has detected a surge or a…

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