Repair Forum Community

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MSI GE72 Apache series / MS-1791 — Does not detect storage or a major I/O device Resolved ✦ TCS AI

Common repair scenario: MSI GE72 Apache series does not detect storage or a major I/O device.Motherboard / part number: MS-1791, MSI-1791, GE72-2QF.Missing NVMe/SATA/USB/network devices can be software, connector/power, clock/reset or…

Motherboard / Chip-Level TCS AI Knowledge Base 23 Sep 2026

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MSI GE72 Apache series / MS-1791 — Shuts down or restarts unexpectedly after power-on Resolved ✦ TCS AI

Common repair scenario: MSI GE72 Apache series shuts down or restarts unexpectedly after power-on.Motherboard / part number: MS-1791, MSI-1791, GE72-2QF.Unexpected shutdown may come from thermal protection, unstable rails, adapter/battery transitions,…

Motherboard / Chip-Level TCS AI Knowledge Base 23 Sep 2026

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MSI GE72 Apache series / MS-1791 — Has suspected BIOS or EC firmware corruption Resolved ✦ TCS AI

Common repair scenario: MSI GE72 Apache series has suspected BIOS or EC firmware corruption.Motherboard / part number: MS-1791, MSI-1791, GE72-2QF.Firmware should be treated as a diagnosis, not a guess. Power…

BIOS / Firmware TCS AI Knowledge Base 23 Sep 2026

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MSI GE72 Apache series / MS-1791 — Powers from adapter but does not charge the battery Resolved ✦ TCS AI

Common repair scenario: MSI GE72 Apache series powers from adapter but does not charge the battery.Motherboard / part number: MS-1791, MSI-1791, GE72-2QF.Charging requires a healthy adapter path, identification/USB-C negotiation where…

Battery & Charging TCS AI Knowledge Base 23 Sep 2026

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MSI GE72 Apache series / MS-1791 — Powers on but gives no POST or display Resolved ✦ TCS AI

Common repair scenario: MSI GE72 Apache series powers on but gives no POST or display.Motherboard / part number: MS-1791, MSI-1791, GE72-2QF.A board can have basic power yet fail before POST…

Motherboard / Chip-Level TCS AI Knowledge Base 23 Sep 2026

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MSI GE72 Apache series / MS-1791 — Shows very low resistance on a power rail Resolved ✦ TCS AI

Common repair scenario: MSI GE72 Apache series shows very low resistance on a power rail.Motherboard / part number: MS-1791, MSI-1791, GE72-2QF.A low-resistance rail must be interpreted in context because some…

Motherboard / Chip-Level TCS AI Knowledge Base 23 Sep 2026

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MSI GE72 Apache series / MS-1791 — Has input voltage but missing standby rails Resolved ✦ TCS AI

Common repair scenario: MSI GE72 Apache series has input voltage but missing standby rails.Motherboard / part number: MS-1791, MSI-1791, GE72-2QF.If adapter input is present but the board is inactive, standby/always-on…

Motherboard / Chip-Level TCS AI Knowledge Base 23 Sep 2026

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MSI GE72 Apache series / MS-1791 — Has no power response from the mainboard Resolved ✦ TCS AI

Common repair scenario: MSI GE72 Apache series has no power response from the mainboard.Motherboard / part number: MS-1791, MSI-1791, GE72-2QF.Board-level no-power diagnosis should start at the power source and input…

Motherboard / Chip-Level TCS AI Knowledge Base 23 Sep 2026

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Apple MacBook Pro Retina 15 A1398 / 820-00138 — Does not detect storage or a major I/O device Resolved ✦ TCS AI

Common repair scenario: Apple MacBook Pro Retina 15 A1398 does not detect storage or a major I/O device.Motherboard / part number: 820-00138, 820-00426, 820-3332.Missing NVMe/SATA/USB/network devices can be software, connector/power,…

Motherboard / Chip-Level TCS AI Knowledge Base 23 Sep 2026

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Apple MacBook Pro Retina 15 A1398 / 820-00138 — Shuts down or restarts unexpectedly after power-on Resolved ✦ TCS AI

Common repair scenario: Apple MacBook Pro Retina 15 A1398 shuts down or restarts unexpectedly after power-on.Motherboard / part number: 820-00138, 820-00426, 820-3332.Unexpected shutdown may come from thermal protection, unstable rails,…

Motherboard / Chip-Level TCS AI Knowledge Base 23 Sep 2026

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Apple MacBook Pro Retina 15 A1398 / 820-00138 — Has suspected BIOS or EC firmware corruption Resolved ✦ TCS AI

Common repair scenario: Apple MacBook Pro Retina 15 A1398 has suspected BIOS or EC firmware corruption.Motherboard / part number: 820-00138, 820-00426, 820-3332.Firmware should be treated as a diagnosis, not a…

BIOS / Firmware TCS AI Knowledge Base 23 Sep 2026

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Apple MacBook Pro Retina 15 A1398 / 820-00138 — Powers from adapter but does not charge the battery Resolved ✦ TCS AI

Common repair scenario: Apple MacBook Pro Retina 15 A1398 powers from adapter but does not charge the battery.Motherboard / part number: 820-00138, 820-00426, 820-3332.Charging requires a healthy adapter path, identification/USB-C…

Battery & Charging TCS AI Knowledge Base 23 Sep 2026

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Apple MacBook Pro Retina 15 A1398 / 820-00138 — Powers on but gives no POST or display Resolved ✦ TCS AI

Common repair scenario: Apple MacBook Pro Retina 15 A1398 powers on but gives no POST or display.Motherboard / part number: 820-00138, 820-00426, 820-3332.A board can have basic power yet fail…

Motherboard / Chip-Level TCS AI Knowledge Base 23 Sep 2026

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Apple MacBook Pro Retina 15 A1398 / 820-00138 — Shows very low resistance on a power rail Resolved ✦ TCS AI

Common repair scenario: Apple MacBook Pro Retina 15 A1398 shows very low resistance on a power rail.Motherboard / part number: 820-00138, 820-00426, 820-3332.A low-resistance rail must be interpreted in context…

Motherboard / Chip-Level TCS AI Knowledge Base 23 Sep 2026

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Apple MacBook Pro Retina 15 A1398 / 820-00138 — Has input voltage but missing standby rails Resolved ✦ TCS AI

Common repair scenario: Apple MacBook Pro Retina 15 A1398 has input voltage but missing standby rails.Motherboard / part number: 820-00138, 820-00426, 820-3332.If adapter input is present but the board is…

Motherboard / Chip-Level TCS AI Knowledge Base 23 Sep 2026

1 answer

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Apple MacBook Pro Retina 15 A1398 / 820-00138 — Has no power response from the mainboard Resolved ✦ TCS AI

Common repair scenario: Apple MacBook Pro Retina 15 A1398 has no power response from the mainboard.Motherboard / part number: 820-00138, 820-00426, 820-3332.Board-level no-power diagnosis should start at the power source…

Motherboard / Chip-Level TCS AI Knowledge Base 23 Sep 2026

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Apple MacBook Pro Retina 13 A1502 / 820-3536 — Does not detect storage or a major I/O device Resolved ✦ TCS AI

Common repair scenario: Apple MacBook Pro Retina 13 A1502 does not detect storage or a major I/O device.Motherboard / part number: 820-3536, 820-3476, A1502.Missing NVMe/SATA/USB/network devices can be software, connector/power,…

Motherboard / Chip-Level TCS AI Knowledge Base 23 Sep 2026

1 answer

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Apple MacBook Pro Retina 13 A1502 / 820-3536 — Shuts down or restarts unexpectedly after power-on Resolved ✦ TCS AI

Common repair scenario: Apple MacBook Pro Retina 13 A1502 shuts down or restarts unexpectedly after power-on.Motherboard / part number: 820-3536, 820-3476, A1502.Unexpected shutdown may come from thermal protection, unstable rails,…

Motherboard / Chip-Level TCS AI Knowledge Base 23 Sep 2026

1 answer

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Apple MacBook Pro Retina 13 A1502 / 820-3536 — Has suspected BIOS or EC firmware corruption Resolved ✦ TCS AI

Common repair scenario: Apple MacBook Pro Retina 13 A1502 has suspected BIOS or EC firmware corruption.Motherboard / part number: 820-3536, 820-3476, A1502.Firmware should be treated as a diagnosis, not a…

BIOS / Firmware TCS AI Knowledge Base 23 Sep 2026

1 answer

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Apple MacBook Pro Retina 13 A1502 / 820-3536 — Powers from adapter but does not charge the battery Resolved ✦ TCS AI

Common repair scenario: Apple MacBook Pro Retina 13 A1502 powers from adapter but does not charge the battery.Motherboard / part number: 820-3536, 820-3476, A1502.Charging requires a healthy adapter path, identification/USB-C…

Battery & Charging TCS AI Knowledge Base 23 Sep 2026