Repair Wiki

Technical articles on MacBook, notebook, and PC repair from our workshop in Munich. Articles Alexey Lavrov has authored on logi.wiki and repair.wiki are mirrored here.

Articles

• Apple T2 Platform Overview of Apple's T2 security chip platform, from a repair and data-recovery perspective. Mirrored from repair.wiki.
• Backlight Troubleshooting How to diagnose MacBook backlight failures — from simple checks to logic-board-level repair. Mirrored from logi.wiki.
• Fusion Drive This article describes what fusion drive is, from the perspective of data recovery.
• MacBook suddenly stopped working after the update to macOS 26.4.1 Your MacBook won't boot after the 26.4.1 update. Why a restore fails with error 4042 and how to recover the machine without losing data.
• Putting an Apple Silicon Mac into DFU mode — key combination and method The key combination to put an Apple silicon Mac into DFU mode — with reliable timing, the correct port, battery notes, and the restore logs for Revive and Restore.
• Signal-line analysis for diagnosing bootloops on Apple Silicon devices Using a logic analyzer on the management buses (I²C, SPMI)