A phone or tablet problem starting right after an OS update, a new case/accessory or a restored backup should be checked against that change first. For iPad external-display output, first connect directly with a known-capable adapter/cable and test the iPad Home screen.
What this covers
- iPad external-display output with this exact failure state
- Diagnosis across mirror-only behavior versus extended display, adapter power and display input
What it does not cover
Try in this order
0 of 4 completedCapture the exact failure state
ReversibleNote the exact update version, accessory or backup date, and confirm the feature worked immediately before it. Expected behavior: negotiate supported video through the port, adapter, cable and app.
Isolate the component boundary
ReversibleConnect directly with a known-capable adapter/cable and test the iPad Home screen. Test with the new accessory removed, or check the update's known-issues note for the exact symptom. Boundary to separate: mirror-only behavior versus extended display, adapter power and display input.
Correct only the proven cause
ReversibleReplace the limiting adapter, select the input or use the display mode supported by the model. Reset the one setting the update changed, or replace the incompatible accessory.
Verify and stop safely
ReversibleConfirm normal operation with the change present for one full day of typical use. Stop for hot adapters, bent ports, liquid or repeated disconnects when the socket moves.
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