Apple MD094LL/A manual Persists, verify if symptom has

7.	Connect external speakers or	Yes	Logic board, internal
	headphones to audio-out port		speakers, and audio-out port
	and play a known-good sound		functioning correctly. Return
	file. Verify if sound quality is		system to user.
	acceptable.
		No	Go to step 8.
8.	Disconnect and carefully	Yes	Replace damaged audio	L14
	inspect audio connectors		connectors assembly. If issue
	assembly and its connection to		persists, verify if symptom has
	logic board for damage such as		changed.
	bent pins or pinched/cut wires.
		No	Replace logic board.	M09

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