{
  "id": "mba-m1-speaker-output",
  "modelId": "mba-m1",
  "title": "Built-in speakers versus redirected audio",
  "intent": "Compare selected output and local playback before a speaker service request.",
  "category": "diagnostics",
  "sourceIds": [
    "mac-sound",
    "mac-safety"
  ],
  "diagramId": "laptop-mac-settings",
  "prerequisites": [
    "Local audio can play",
    "Volume can remain comfortable"
  ],
  "tools": [
    "Two known local audio files"
  ],
  "steps": [
    {
      "id": "file",
      "text": "Try a known local file and inspect the app volume. Select a second file to distinguish one silent source from a silent output.",
      "sourceIds": [
        "mac-sound"
      ],
      "locator": "Opening → app volume / different file"
    },
    {
      "id": "route",
      "text": "Disconnect headphones and external speakers. Record the currently selected output category; a display or USB device may be receiving the sound.",
      "sourceIds": [
        "mac-sound"
      ],
      "locator": "Built-in / external / display outputs"
    },
    {
      "id": "output",
      "text": "In System Settings → Sound → Output, select the Mac speakers, set a comfortable level and clear mute. Earlier macOS uses System Preferences; use its matching guide.",
      "sourceIds": [
        "mac-sound"
      ],
      "locator": "Built-in speakers, steps 2–4"
    },
    {
      "id": "compare",
      "text": "Replay both local sources on the same built-in output. If compatible owned headphones are available, compare them afterward without increasing volume excessively.",
      "sourceIds": [
        "mac-sound"
      ],
      "locator": "Built-in and external audio output; original controlled comparison"
    },
    {
      "id": "handoff",
      "text": "If local playback works but calls do not, retain the call-only distinction. If built-in output is absent or silent across local sources, take that observation to Apple.",
      "sourceIds": [
        "mac-sound"
      ],
      "locator": "Output and app-volume guidance; original service routing"
    }
  ],
  "checks": [
    {
      "id": "safety",
      "question": "Is there swelling, a lifted case or trackpad, liquid damage, smoke, a burning smell, or damaged power equipment?",
      "goal": "Establish whether any powered comparison is safe.",
      "sourceIds": [
        "mac-safety"
      ],
      "options": [
        {
          "id": "safe",
          "label": "No visible danger",
          "next": "output"
        },
        {
          "id": "danger",
          "label": "Yes, or suspected damage",
          "next": "stop"
        },
        {
          "id": "unknown",
          "label": "Not checked / unsure",
          "next": "uncertain"
        }
      ]
    },
    {
      "id": "output",
      "question": "Are Mac speakers selected, unmuted and at a comfortable level?",
      "goal": "Establish the intended output.",
      "sourceIds": [
        "mac-sound"
      ],
      "options": [
        {
          "id": "yes",
          "label": "Built-in route confirmed",
          "next": "local"
        },
        {
          "id": "absent",
          "label": "Built-in output absent",
          "next": "service"
        },
        {
          "id": "pending",
          "label": "Settings not established",
          "next": "attention"
        },
        {
          "id": "unknown",
          "label": "Not checked / unsure",
          "next": "uncertain"
        }
      ]
    },
    {
      "id": "local",
      "question": "What happened with the two local files?",
      "goal": "Separate file/app scope from output failure.",
      "sourceIds": [
        "mac-sound"
      ],
      "options": [
        {
          "id": "both",
          "label": "Both audible",
          "next": "ready"
        },
        {
          "id": "one",
          "label": "Only one source audible",
          "next": "app-help"
        },
        {
          "id": "neither",
          "label": "Neither audible",
          "next": "service"
        },
        {
          "id": "unknown",
          "label": "Not checked / unsure",
          "next": "uncertain"
        }
      ]
    }
  ],
  "terminals": {
    "ready": {
      "type": "preparation_saved",
      "title": "Built-in audio baseline saved",
      "text": "Use the working local result when reviewing call-only audio.",
      "handoff": [
        "Record the selected output category.",
        "Review the meeting app output privately if calls remain silent."
      ]
    },
    "app-help": {
      "type": "maintenance_possible",
      "title": "Review the silent source",
      "text": "One local source works through the same output.",
      "handoff": [
        "Retain the working source category.",
        "Contact the affected app provider before a speaker replacement."
      ]
    },
    "service": {
      "type": "service_needed",
      "title": "Request output support",
      "text": "Built-in output is absent or remains silent across local sources.",
      "handoff": [
        "Report output visibility and mute state.",
        "Include headphone comparison if available."
      ]
    },
    "attention": {
      "type": "maintenance_possible",
      "title": "Confirm the output first",
      "text": "A silent redirected route does not establish a built-in speaker fault.",
      "handoff": [
        "Identify the selected route.",
        "Mark unplayed files Not tested."
      ]
    },
    "uncertain": {
      "type": "preparation_saved",
      "title": "Keep the unanswered checks visible",
      "text": "Selected output, mute state or local playback is unconfirmed.",
      "handoff": [
        "Provide output visibility and local playback results.",
        "List connected audio routes and omitted comparisons.",
        "Keep unperformed conditions marked Not tested. Ask the provider to confirm these before further changes."
      ]
    },
    "stop": {
      "type": "service_needed",
      "title": "Stop the powered checks",
      "text": "Stop using or charging damaged equipment. Keep away from hot or smoking equipment; obtain emergency help for an immediate fire risk. Arrange manufacturer guidance before handling or transport.",
      "handoff": [
        "Tell Apple about the visible damage before arranging a MacBook Air service.",
        "Provide output visibility and local playback results.",
        "Do not open the case, remove the battery, press a lifted surface, or continue a test to complete this record."
      ]
    }
  },
  "missing": "Selected output, mute state or local playback is unconfirmed.",
  "handoff": [
    "Provide output visibility and local playback results.",
    "List connected audio routes and omitted comparisons."
  ],
  "outcomeChecks": [
    "App and system volume are distinguished.",
    "Call-only failure has a local comparison."
  ],
  "workflow": {
    "family": "condition-matrix",
    "summary": "Tie each audio result to its selected output.",
    "osOptions": [
      "macos26-plus",
      "macos-earlier",
      "macos-unknown"
    ],
    "fields": [
      {
        "id": "output-selected",
        "label": "Selected output",
        "type": "select",
        "options": [
          {
            "value": "unknown",
            "label": "Not checked"
          },
          {
            "value": "built-in",
            "label": "Mac speakers"
          },
          {
            "value": "headphone",
            "label": "Headphones"
          },
          {
            "value": "external",
            "label": "Display/USB/Bluetooth"
          },
          {
            "value": "missing",
            "label": "Speakers absent"
          }
        ]
      },
      {
        "id": "mute-volume",
        "label": "Mute and level",
        "type": "select",
        "options": [
          {
            "value": "unknown",
            "label": "Not checked"
          },
          {
            "value": "comfortable",
            "label": "Unmuted, comfortable"
          },
          {
            "value": "muted",
            "label": "Muted / zero"
          },
          {
            "value": "unavailable",
            "label": "Unavailable"
          }
        ]
      },
      {
        "id": "audio-scope",
        "label": "Failure scope",
        "type": "select",
        "options": [
          {
            "value": "unknown",
            "label": "Not established"
          },
          {
            "value": "all-local",
            "label": "All local files"
          },
          {
            "value": "one-app",
            "label": "One app/file"
          },
          {
            "value": "calls",
            "label": "Calls only"
          },
          {
            "value": "working",
            "label": "Audible now"
          }
        ]
      }
    ],
    "matrix": {
      "title": "Local playback conditions",
      "rows": [
        {
          "id": "file-one",
          "label": "First local file",
          "condition": "Built-in speakers, comfortable volume"
        },
        {
          "id": "file-two",
          "label": "Second local file",
          "condition": "Same output and volume"
        },
        {
          "id": "headphones",
          "label": "Optional headphones",
          "condition": "Same file; owned compatible headphones"
        }
      ],
      "results": [
        {
          "value": "not-tested",
          "label": "Not tested"
        },
        {
          "value": "works",
          "label": "Works in this condition"
        },
        {
          "value": "fails",
          "label": "Fails in this condition"
        },
        {
          "value": "intermittent",
          "label": "Intermittent"
        },
        {
          "value": "not-applicable",
          "label": "Not applicable"
        }
      ]
    },
    "reportFocus": [
      "Selected output",
      "Local source scope",
      "Volume state"
    ],
    "notDoneGuidance": [
      "Keep volume comfortable.",
      "Unavailable headphones remain Not tested."
    ]
  },
  "entityKind": "task",
  "version": "2.0.0",
  "deviceFamily": "laptop",
  "modelApplicability": {
    "id": "mba-m1",
    "name": "MacBook Air M1",
    "family": "laptop",
    "revision": "MacBook Air (M1, 2020), Apple M1 chip",
    "os": "macOS Big Sur or later; Ventura and later call the preferences app System Settings. Diagnostic screens vary by macOS.",
    "region": "US-first; local repair provider requirements vary.",
    "help": "Choose Apple menu → About This Mac. Confirm MacBook Air (M1, 2020) and Chip: Apple M1. An Intel processor or another chip does not match.",
    "exclusions": [
      "MacBook Air Intel 2020",
      "MacBook Air M2",
      "MacBook Pro M1"
    ],
    "sourceIds": [
      "mac-id",
      "mac-spec",
      "mac-diagnostics"
    ]
  },
  "exclusions": [
    "MacBook Air Intel 2020",
    "MacBook Air M2",
    "MacBook Pro M1"
  ],
  "materials": [
    "Keep any existing backup accessible to you.",
    "Keep credentials and personal files outside this record."
  ],
  "stopConditions": [
    "Stop using and charging equipment with swelling, casing separation, smoke, a burning smell or suspected battery damage. Do not open or press on it.",
    "Set damaged accessories aside. Do not open mains adapters or force connectors.",
    "Do not erase, reset, flash firmware or bypass a lock as a default diagnostic step."
  ],
  "branches": [
    {
      "from": "safety",
      "answer": "safe",
      "to": "output"
    },
    {
      "from": "safety",
      "answer": "danger",
      "to": "stop"
    },
    {
      "from": "safety",
      "answer": "unknown",
      "to": "uncertain"
    },
    {
      "from": "output",
      "answer": "yes",
      "to": "local"
    },
    {
      "from": "output",
      "answer": "absent",
      "to": "service"
    },
    {
      "from": "output",
      "answer": "pending",
      "to": "attention"
    },
    {
      "from": "output",
      "answer": "unknown",
      "to": "uncertain"
    },
    {
      "from": "local",
      "answer": "both",
      "to": "ready"
    },
    {
      "from": "local",
      "answer": "one",
      "to": "app-help"
    },
    {
      "from": "local",
      "answer": "neither",
      "to": "service"
    },
    {
      "from": "local",
      "answer": "unknown",
      "to": "uncertain"
    }
  ],
  "sources": [
    {
      "id": "mac-sound",
      "title": "No sound from Mac speakers",
      "url": "https://support.apple.com/en-nz/guide/mac-help/mchlp1439/mac",
      "locator": "Opening / Built-in speakers / External outputs",
      "purpose": "App volume, local source and selected built-in output",
      "checkedAt": "2026-10-13",
      "reuse": "Reference only. Original paraphrase and observation worksheets; no copied images or manual pages.",
      "licenseStatus": "Public support document; no redistribution license assumed."
    },
    {
      "id": "mac-safety",
      "title": "Important safety information for your Mac",
      "url": "https://support.apple.com/guide/macbook-air/important-safety-information-apd9b8f7aa11/mac",
      "locator": "Handling / Built-in battery / Charging",
      "purpose": "General damaged-equipment and moisture safety only; M1-specific connections are sourced from mac-spec",
      "checkedAt": "2026-10-13",
      "reuse": "Reference only. Original paraphrase and observation worksheets; no copied images or manual pages.",
      "licenseStatus": "Public support document; no redistribution license assumed."
    },
    {
      "id": "mac-id",
      "title": "Identify MacBook Air model",
      "url": "https://support.apple.com/en-ie/102869",
      "locator": "Find model / MacBook Air M1 2020",
      "purpose": "Model and chip confirmation",
      "checkedAt": "2026-10-04",
      "reuse": "Reference only. Original paraphrase; no copied images or manual pages.",
      "licenseStatus": "Public support document; no redistribution license assumed."
    },
    {
      "id": "mac-spec",
      "title": "MacBook Air (M1, 2020) technical specifications",
      "url": "https://support.apple.com/en-us/111883",
      "locator": "Charging and Expansion / Display Support",
      "purpose": "Two USB-C Thunderbolt/USB4 ports and one native external display up to 6K at 60 Hz",
      "checkedAt": "2026-10-13",
      "reuse": "Reference only. Original paraphrase and observation worksheets; no copied images or manual pages.",
      "licenseStatus": "Public support document; no redistribution license assumed."
    },
    {
      "id": "mac-diagnostics",
      "title": "Use Apple Diagnostics to test your Mac",
      "url": "https://support.apple.com/en-gb/102550",
      "locator": "Prepare / Apple silicon / Run Apple Diagnostics / Results",
      "purpose": "M1 Options then Command-D; Tahoe 26+ selected tests versus earlier automatic testing; preserve reference code",
      "checkedAt": "2026-10-13",
      "reuse": "Reference only. Original paraphrase and observation worksheets; no copied images or manual pages.",
      "licenseStatus": "Public support document; no redistribution license assumed."
    },
    {
      "id": "mac-keyboard",
      "title": "Mac does not respond to key presses",
      "url": "https://support.apple.com/en-sa/guide/mac-help/mchlp1240/mac",
      "locator": "Built-in keyboard / Other keys",
      "purpose": "Low battery, Slow Keys, Mouse Keys and input layout",
      "checkedAt": "2026-10-13",
      "reuse": "Reference only. Original paraphrase and observation worksheets; no copied images or manual pages.",
      "licenseStatus": "Public support document; no redistribution license assumed."
    },
    {
      "id": "mac-sleep",
      "title": "Mac sleeps or wakes unexpectedly",
      "url": "https://support.apple.com/en-gb/guide/mac-help/-mchlp2995/mac",
      "locator": "Check sleep settings / Network access / Sharing / Activity / Something else is waking your Mac",
      "purpose": "Sleep/wake settings, background activity and peripheral comparison",
      "checkedAt": "2026-10-13",
      "reuse": "Reference only. Original paraphrase and observation worksheets; no copied images or manual pages.",
      "licenseStatus": "Public support document; no redistribution license assumed."
    }
  ],
  "assets": [
    {
      "id": "laptop-mac-settings",
      "path": "/assets/laptop-mac-settings.svg",
      "title": "Mac settings and observation map",
      "alt": "Original schematic locating Sound Output, Accessibility Keyboard and Pointer Control, and sleep-related settings; older macOS labels differ.",
      "sourceIds": [
        "mac-sound",
        "mac-keyboard",
        "mac-sleep"
      ],
      "caption": "Original schematic of setting relationships. Use the guide version matching installed macOS; this is not a screenshot.",
      "kind": "Original schematic"
    }
  ],
  "relatedIds": [
    "mba-m1-wifi-access",
    "mba-m1-external-display",
    "mba-m1-keyboard-input"
  ],
  "estimatedDuration": {
    "minutes": 20,
    "label": "Planning estimate for recording observations; excludes charging, backups, drying and service. Not a measured repair time."
  },
  "legacyVersion": "1.0.0",
  "legacyChecks": [
    {
      "id": "safety",
      "goal": "Separate unsafe hardware from routine preparation.",
      "question": "Any swelling, casing separation, liquid damage, smoke, burning smell, or damaged battery/adapter?",
      "sourceIds": [
        "mac-charge"
      ],
      "options": [
        {
          "id": "safe",
          "label": "No visible danger",
          "next": "check-1"
        },
        {
          "id": "danger",
          "label": "Yes, or suspected damage",
          "next": "stop"
        },
        {
          "id": "unknown",
          "label": "I cannot confirm",
          "next": "uncertain"
        }
      ]
    },
    {
      "id": "check-1",
      "goal": "Establish one known output.",
      "question": "Are the built-in speakers selected with app and system mute cleared?",
      "sourceIds": [
        "mac-sound"
      ],
      "options": [
        {
          "id": "yes",
          "label": "Yes",
          "next": "check-2"
        },
        {
          "id": "no",
          "label": "No",
          "next": "attention"
        },
        {
          "id": "unknown",
          "label": "Not checked / unsure",
          "next": "uncertain"
        }
      ]
    },
    {
      "id": "check-2",
      "goal": "Compare actual audio.",
      "question": "Can you hear the known file from the built-in speakers?",
      "sourceIds": [
        "mac-sound"
      ],
      "options": [
        {
          "id": "yes",
          "label": "Audio audible",
          "next": "ready"
        },
        {
          "id": "no",
          "label": "Still silent",
          "next": "service"
        },
        {
          "id": "unknown",
          "label": "Not checked / unsure",
          "next": "uncertain"
        }
      ]
    }
  ],
  "legacyPreparation": [
    "Mac can play a local file",
    "No liquid or physical damage",
    "Known local audio file at a comfortable volume",
    "A private place to keep your findings",
    "A current backup if the device is accessible"
  ]
}