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<blockquote data-quote="Drumbolt" data-source="post: 847713" data-attributes="member: 71200">Hey all, hoping someone's run into this before.My D300's mirror is stuck up at rest, and the behavior is backwards from normal:&nbsp; &nbsp; •&nbsp; &nbsp; Normally: mirror down (viewfinder) → flips up during exposure → drops back down after&nbsp; &nbsp; •&nbsp; &nbsp; Mine: mirror sits up at rest → when I press the shutter, it drops down → then pops back up and stays thereMechanically everything seems fine — a local shop tech confirmed the mirror moves freely, spring/hinge are good, no physical obstruction. His read is that it's likely a firmware/software timing issue rather than a mechanical fault, since the motion itself is working, just in the wrong order relative to the shutter cycle.What I've tried so far:&nbsp; &nbsp; •&nbsp; &nbsp; Power cycling (multiple times, no motor sound/movement on its own)&nbsp; &nbsp; •&nbsp; &nbsp; Battery swap (no change)&nbsp; &nbsp; •&nbsp; &nbsp; Mirror-up cleaning mode toggle&nbsp; &nbsp; •&nbsp; &nbsp; Two-button reset / reset all settings&nbsp; &nbsp; •&nbsp; &nbsp; Checking firmware versionAny insight would be greatly appreciated!</blockquote>

[QUOTE="Drumbolt, post: 847713, member: 71200"] Hey all, hoping someone's run into this before. My D300's mirror is stuck up at rest, and the behavior is backwards from normal: • Normally: mirror down (viewfinder) → flips up during exposure → drops back down after • Mine: mirror sits up at rest → when I press the shutter, it drops down → then pops back up and stays there Mechanically everything seems fine — a local shop tech confirmed the mirror moves freely, spring/hinge are good, no physical obstruction. His read is that it's likely a firmware/software timing issue rather than a mechanical fault, since the motion itself is working, just in the wrong order relative to the shutter cycle. What I've tried so far: • Power cycling (multiple times, no motor sound/movement on its own) • Battery swap (no change) • Mirror-up cleaning mode toggle • Two-button reset / reset all settings • Checking firmware version Any insight would be greatly appreciated! [/QUOTE]

Verification