{
  "id": "pixel7-black-screen",
  "modelId": "pixel7",
  "title": "Black screen: charging and ring response",
  "intent": "Distinguish no visible power response from a phone that rings with a blank display.",
  "category": "diagnostics",
  "sourceIds": [
    "pixel-charge",
    "pixel-restart",
    "pixel-safety"
  ],
  "prerequisites": [
    "Dry intact phone and compatible power setup",
    "A second phone for an optional ordinary incoming call"
  ],
  "tools": [
    "Known-working USB-C cable, charger and outlet",
    "An owned second phone if available"
  ],
  "steps": [
    {
      "id": "power",
      "text": "Try holding Power for 5–7 seconds to start the Pixel. Record any battery graphic, startup logo or other visible response.",
      "sourceIds": [
        "pixel-charge"
      ],
      "locator": "Turn on the device or hold Power"
    },
    {
      "id": "charge",
      "text": "Use a known-working charging setup. Check after one minute; if charge may be very low, allow at least another 10 minutes before expecting screen startup.",
      "sourceIds": [
        "pixel-charge"
      ],
      "locator": "Use a working charger; low-charge tip"
    },
    {
      "id": "reboot",
      "text": "If the screen stays blank, follow the charging article’s screen check: hold Power for about 35 seconds, then wait about 2 minutes. Stop if the phone restarts earlier.",
      "sourceIds": [
        "pixel-charge"
      ],
      "locator": "Troubleshoot your screen, steps 1–2"
    },
    {
      "id": "ring",
      "text": "Try one ordinary incoming call from another phone if available. Record audible ringing separately from what the caller hears; silent mode or no connection can make no-ring results inconclusive.",
      "sourceIds": [
        "pixel-charge"
      ],
      "locator": "Troubleshoot your screen, step 3"
    },
    {
      "id": "display",
      "text": "Look closely for a very dim image without repeatedly pressing buttons. If it audibly rings but remains blank, Google directs authorized repair support.",
      "sourceIds": [
        "pixel-charge"
      ],
      "locator": "Step 4; low brightness tip"
    },
    {
      "id": "stop",
      "text": "Stop at the recorded response and raise backup/data access with support. The optional manual reset section of the source is outside this task.",
      "sourceIds": [
        "pixel-charge"
      ],
      "locator": "When to contact support; reset data-loss warning"
    }
  ],
  "checks": [
    {
      "id": "safety",
      "goal": "Check for a reason to stop before powered tests.",
      "question": "Is there swelling, lifted glass, casing separation, liquid damage, smoke, a burning smell, or damaged charging equipment?",
      "sourceIds": [
        "pixel-safety"
      ],
      "options": [
        {
          "id": "safe",
          "label": "No visible danger; safe to continue",
          "next": "power-path"
        },
        {
          "id": "danger",
          "label": "Yes, or suspected damage",
          "next": "stop"
        },
        {
          "id": "unknown",
          "label": "I cannot confirm safety",
          "next": "uncertain"
        }
      ]
    },
    {
      "id": "power-path",
      "question": "Was the known-working charging setup and low-charge wait completed?",
      "goal": "Avoid mistaking depleted power for a display fault.",
      "sourceIds": [
        "pixel-charge"
      ],
      "options": [
        {
          "id": "yes",
          "label": "Confirmed",
          "next": "display"
        },
        {
          "id": "no",
          "label": "Not available / not completed",
          "next": "attention"
        },
        {
          "id": "unknown",
          "label": "Not checked / unsure",
          "next": "uncertain"
        }
      ]
    },
    {
      "id": "display",
      "question": "What did the screen show after the bounded restart check?",
      "goal": "Record the furthest visible state.",
      "sourceIds": [
        "pixel-charge"
      ],
      "options": [
        {
          "id": "usable",
          "label": "Usable display returned",
          "next": "ready"
        },
        {
          "id": "dim",
          "label": "Very dim image remains",
          "next": "service"
        },
        {
          "id": "blank",
          "label": "Still blank",
          "next": "ring"
        },
        {
          "id": "unknown",
          "label": "Could not complete the check",
          "next": "uncertain"
        }
      ]
    },
    {
      "id": "ring",
      "question": "Did the Pixel itself audibly ring during an incoming call?",
      "goal": "Separate a positive ring response from inconclusive silence.",
      "sourceIds": [
        "pixel-charge"
      ],
      "options": [
        {
          "id": "rings",
          "label": "Phone rings but display stays blank",
          "next": "service"
        },
        {
          "id": "silent",
          "label": "No ring heard after attempted call",
          "next": "service"
        },
        {
          "id": "unavailable",
          "label": "Call unavailable or result uncertain",
          "next": "uncertain"
        }
      ]
    }
  ],
  "terminals": {
    "ready": {
      "type": "preparation_saved",
      "title": "Comparison recorded",
      "text": "Save the startup/charging condition that restored the display and back up accessible data.",
      "handoff": [
        "Charging indication and furthest screen state",
        "Charging-article restart check completed or skipped",
        "Audible ring versus blank screen; backup/data access status"
      ]
    },
    "attention": {
      "type": "maintenance_possible",
      "title": "Complete the missing preparation",
      "text": "Complete a safe known-power comparison and low-charge wait before using the display check.",
      "handoff": [
        "Use a verified compatible charger and allow the low-charge wait.",
        "Charging indication and furthest screen state",
        "Charging-article restart check completed or skipped",
        "Audible ring versus blank screen; backup/data access status"
      ]
    },
    "service": {
      "type": "service_needed",
      "title": "Discuss the recorded result with support",
      "text": "For ring-with-blank-screen, contact an authorized repair center. For no response, give Google all completed power checks; lack of ringing alone does not prove power failure.",
      "handoff": [
        "Charging indication and furthest screen state",
        "Charging-article restart check completed or skipped",
        "Audible ring versus blank screen; backup/data access status"
      ]
    },
    "uncertain": {
      "type": "preparation_saved",
      "title": "Keep the unknowns in your handoff",
      "text": "The charging, restart or incoming-call comparison is incomplete. Keep positive responses and untested conditions separate.",
      "handoff": [
        "Tell support whether a second phone, audible ringer or usable power setup was unavailable.",
        "Charging indication and furthest screen state",
        "Charging-article restart check completed or skipped",
        "Audible ring versus blank screen; backup/data access status"
      ]
    },
    "stop": {
      "type": "service_needed",
      "title": "Stop powered checks",
      "text": "Stop using or charging damaged equipment. Do not open or press on the phone or handle hot or smoking equipment. Contact Google or an authorized provider; use local emergency help for immediate fire danger.",
      "handoff": [
        "Describe any battery/casing damage or abnormal heat before further power attempts.",
        "Charging indication and furthest screen state",
        "Charging-article restart check completed or skipped",
        "Audible ring versus blank screen; backup/data access status"
      ]
    }
  },
  "outcomeChecks": [
    "Save the startup/charging condition that restored the display and back up accessible data.",
    "For ring-with-blank-screen, contact an authorized repair center. For no response, give Google all completed power checks; lack of ringing alone does not prove power failure."
  ],
  "diagramId": "phone-pixel-ports",
  "workflow": {
    "family": "startup-diagnostics",
    "summary": "Use the charging article’s bounded screen check and retain only observable responses.",
    "fields": [
      {
        "id": "pixel-initial-screen",
        "label": "Initial display",
        "type": "select",
        "options": [
          {
            "value": "unknown",
            "label": "Not checked / unknown"
          },
          {
            "value": "blank",
            "label": "Blank"
          },
          {
            "value": "battery",
            "label": "Battery graphic"
          },
          {
            "value": "logo",
            "label": "Startup logo"
          },
          {
            "value": "dim",
            "label": "Very dim image"
          }
        ]
      },
      {
        "id": "pixel-start-check",
        "label": "Power-button observation",
        "type": "select",
        "options": [
          {
            "value": "unknown",
            "label": "Not checked / unknown"
          },
          {
            "value": "response",
            "label": "Response during power-on attempt"
          },
          {
            "value": "none",
            "label": "No response"
          },
          {
            "value": "unavailable",
            "label": "Button unusable"
          }
        ]
      },
      {
        "id": "screen-check-complete",
        "label": "Screen-check sequence",
        "type": "select",
        "options": [
          {
            "value": "unknown",
            "label": "Not checked / unknown"
          },
          {
            "value": "complete",
            "label": "About 35-second hold and 2-minute wait completed"
          },
          {
            "value": "early",
            "label": "Phone restarted before full hold"
          },
          {
            "value": "skipped",
            "label": "Not completed"
          }
        ]
      },
      {
        "id": "ring-observation",
        "label": "Incoming-call observation",
        "type": "select",
        "options": [
          {
            "value": "unknown",
            "label": "Not checked / unknown"
          },
          {
            "value": "audible",
            "label": "Pixel itself audibly rang"
          },
          {
            "value": "none",
            "label": "No audible ring"
          },
          {
            "value": "uncertain",
            "label": "Call result uncertain or unavailable"
          }
        ]
      }
    ],
    "matrix": {
      "title": "Visible and audible responses",
      "rows": [
        {
          "id": "power-on",
          "label": "Power-on attempt",
          "condition": "Power held 5–7 seconds; no danger signs"
        },
        {
          "id": "charge",
          "label": "Known setup after low-charge wait",
          "condition": "Compatible equipment; record visible indication"
        },
        {
          "id": "restart",
          "label": "After charging-article screen check",
          "condition": "About 35-second Power hold, then about 2-minute wait"
        },
        {
          "id": "call",
          "label": "Audible ring check",
          "condition": "Second phone available; ordinary call; no number stored"
        }
      ],
      "results": [
        {
          "value": "not-tested",
          "label": "Not tested"
        },
        {
          "value": "works",
          "label": "Expected result"
        },
        {
          "value": "fails",
          "label": "Problem observed"
        },
        {
          "value": "intermittent",
          "label": "Intermittent"
        },
        {
          "value": "not-applicable",
          "label": "Not applicable"
        }
      ]
    },
    "reportFocus": [
      "A positive audible ring with a blank display",
      "Which charging and restart steps actually occurred"
    ],
    "notDoneGuidance": [
      "Do not infer phone-side ringing from caller-side ringback.",
      "No manual reset, Fastboot or data erasure is included."
    ],
    "osOptions": [
      "android14-dec2023-plus",
      "android-earlier",
      "android-unknown"
    ]
  },
  "entityKind": "task",
  "version": "2.0.0",
  "deviceFamily": "phone",
  "modelApplicability": {
    "id": "pixel7",
    "name": "Pixel 7",
    "family": "phone",
    "revision": "Standard Pixel 7 (2022), stock Android",
    "os": "Android 14 December 2023 update or later for Repair Mode. Other checks: stock Android with the named settings available.",
    "region": "US-first; repair options depend on country and warranty.",
    "help": "Open Settings → About phone and confirm Pixel 7. Check Android version and security update locally. Pixel 7a and Pixel 7 Pro are separate models.",
    "exclusions": [
      "Pixel 7a",
      "Pixel 7 Pro",
      "Pixel 6",
      "custom Android ROM"
    ],
    "sourceIds": [
      "pixel-safety",
      "pixel-repair"
    ]
  },
  "exclusions": [
    "Pixel 7a",
    "Pixel 7 Pro",
    "Pixel 6",
    "custom Android ROM"
  ],
  "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": "power-path"
    },
    {
      "from": "safety",
      "answer": "danger",
      "to": "stop"
    },
    {
      "from": "safety",
      "answer": "unknown",
      "to": "uncertain"
    },
    {
      "from": "power-path",
      "answer": "yes",
      "to": "display"
    },
    {
      "from": "power-path",
      "answer": "no",
      "to": "attention"
    },
    {
      "from": "power-path",
      "answer": "unknown",
      "to": "uncertain"
    },
    {
      "from": "display",
      "answer": "usable",
      "to": "ready"
    },
    {
      "from": "display",
      "answer": "dim",
      "to": "service"
    },
    {
      "from": "display",
      "answer": "blank",
      "to": "ring"
    },
    {
      "from": "display",
      "answer": "unknown",
      "to": "uncertain"
    },
    {
      "from": "ring",
      "answer": "rings",
      "to": "service"
    },
    {
      "from": "ring",
      "answer": "silent",
      "to": "service"
    },
    {
      "from": "ring",
      "answer": "unavailable",
      "to": "uncertain"
    }
  ],
  "sources": [
    {
      "id": "pixel-charge",
      "title": "Pixel will not charge or turn on",
      "url": "https://support.google.com/pixelphone/answer/7167687?hl=en",
      "locator": "Charger/cable/outlet; Charge for 10 minutes; Troubleshoot screen",
      "purpose": "Power-path comparison, low-charge wait and 35-second screen check",
      "checkedAt": "2026-10-13",
      "reuse": "Reference only. Bounded original paraphrase and original schematics; no copied support images or pages.",
      "licenseStatus": "Public official support documentation; no redistribution license assumed.",
      "verifiedUnits": {
        "seconds": [
          5,
          7,
          35
        ],
        "minutes": [
          1,
          2,
          10
        ]
      }
    },
    {
      "id": "pixel-restart",
      "title": "Turn your Pixel phone on and off",
      "url": "https://support.google.com/pixelphone/answer/7374159?hl=en",
      "locator": "Pixel 6 and later; Restart",
      "purpose": "Power plus Volume up for Pixel 7 normal power menu",
      "checkedAt": "2026-10-13",
      "reuse": "Reference only. Bounded original paraphrase and original schematics; no copied support images or pages.",
      "licenseStatus": "Public official support documentation; no redistribution license assumed."
    },
    {
      "id": "pixel-safety",
      "title": "Pixel 7 safety and regulatory guide",
      "url": "https://support.google.com/pixelphone/answer/12164747?hl=en",
      "locator": "Safety warnings; Repair and service; Charging",
      "purpose": "Model-specific damaged-device and charging safety",
      "checkedAt": "2026-10-13",
      "reuse": "Reference only. Bounded original paraphrase and original schematics; no copied support images or pages.",
      "licenseStatus": "Public official support documentation; no redistribution license assumed."
    },
    {
      "id": "pixel-repair",
      "title": "Use Pixel Repair Mode",
      "url": "https://support.google.com/pixelphone/answer/14266732?hl=en",
      "locator": "Learn how it works; Access; Exit",
      "purpose": "Android 14 December 2023+, 2 GB, backups, possible reset and credential privacy",
      "checkedAt": "2026-10-13",
      "reuse": "Reference only. Bounded original paraphrase and original schematics; no copied support images or pages.",
      "licenseStatus": "Public official support documentation; no redistribution license assumed.",
      "verifiedUnits": {
        "GB": [
          2
        ]
      }
    },
    {
      "id": "pixel-hardware",
      "title": "Pixel phone hardware diagram",
      "url": "https://support.google.com/pixelphone/answer/7157629?hl=en",
      "locator": "Pixel 7",
      "purpose": "External power/volume controls and USB-C port",
      "checkedAt": "2026-10-13",
      "reuse": "Reference only. Bounded original paraphrase and original schematics; no copied support images or pages.",
      "licenseStatus": "Public official support documentation; no redistribution license assumed."
    }
  ],
  "assets": [
    {
      "id": "phone-pixel-ports",
      "path": "/assets/phone-pixel-ports.svg",
      "title": "Pixel 7 controls and USB-C",
      "alt": "Schematic front view of Pixel 7 with Power above the volume rocker on the right and USB-C centered at the bottom. Normal menu uses Power and Volume up.",
      "sourceIds": [
        "pixel-hardware",
        "pixel-restart",
        "pixel-charge"
      ],
      "caption": "Original external-control schematic. The blank-screen task uses the separately cited charging-article check.",
      "kind": "Original schematic"
    }
  ],
  "relatedIds": [
    "pixel7-safe-mode",
    "pixel7-battery-drain",
    "pixel7-wired-charge"
  ],
  "estimatedDuration": {
    "minutes": 20,
    "label": "Planning estimate for recording observations; excludes charging, backups, drying and service. Not a measured repair time."
  }
}