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Board-level repair reference

Electronics repair,
component level.

Voltage tables, diode mode readings, schematics and diagnostic guides for MacBook logic boards, GPUs, consoles, laptops, and more. Everything a technician needs — free, no account required.

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4+Boards indexed
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Voltage rails & diode mode readings
Schematics & boardview availability
MacBook · GPU · Console · Laptop
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Apple Logic Boards
MacBook · iMac · Mac Mini
14 guides
Apple Logic Boards
MacBook Pro 13-inch M2 A2686 — Logic Board Repair
Board-level repair guide for MacBook Pro 13-inch M2 A2686. PP3V3_S5, PP5V_S5, SMC_BC_ACOK, PPBUS_G3H voltage measurement…
Level 3 →
Apple Logic Boards
MacBook Pro 13-inch M1 A2338 — Logic Board Repair
Board-level repair guide for MacBook Pro 13-inch M1 A2338. PP3V3_S5, PP5V_S5, SMC_BC_ACOK, PPBUS_G3H voltage measurement…
Level 3 →
Apple Logic Boards
MacBook Pro 16-inch M1 Pro A2485 — Logic Board Repair
Board-level repair guide for MacBook Pro 16-inch M1 Pro A2485. PP3V3_S5, PP5V_S5, SMC_BC_ACOK, PPBUS_G3H voltage measure…
Level 3 →
Apple Logic Boards
MacBook Pro 16-inch M2 Max A2780 — Logic Board Repair
Board-level repair guide for MacBook Pro 16-inch M2 Max A2780. PP3V3_S5, PP5V_S5, SMC_BC_ACOK, PPBUS_G3H voltage measure…
Level 3 →
Apple Logic Boards
MacBook Pro M3 Max A2991 No Power Board Repair — Apple Silicon Logic Board
Board-level repair guide for MacBook Pro M3 Max A2991. Fix no power on Apple M3 Max logic boards — USB-C, PPBUS_G3H and …
Level 3 →
Apple Logic Boards
MacBook Pro 14-inch M2 Pro A2779 No Power Repair — Apple Silicon Logic Board
Board-level repair guide for MacBook Pro 14-inch M2 Pro A2779. Fix no power on Apple M2 Pro logic boards — USB-C PD, PPB…
Level 3 →
Apple Logic Boards
MacBook Pro 14-inch M1 Pro A2442 No Power Repair — Logic Board 820-02098
820-02098
Board-level repair guide for MacBook Pro 14-inch M1 Pro A2442 (820-02098). Diagnose no power on Apple M1 Pro boards — US…
Level 3 →
Apple Logic Boards
MacBook Air M3 A3114 No Power Board Repair — Apple Silicon 15-inch
Board-level repair guide for MacBook Air M3 A3114 (15-inch). Fix no power on Apple M3 logic boards — USB-C PD, standby r…
Level 3 →
Apple Logic Boards
MacBook Air M2 A2681 No Power Board Repair — Apple Silicon, USB-C PD
Board-level repair guide for MacBook Air M2 A2681. Fix no power on Apple M2 logic boards — USB-C power delivery faults, …
Level 3 →
Apple Logic Boards
MacBook Air M1 A2337 No Power Board Repair — Apple Silicon Logic Board (820-02016)
820-02016
Board-level repair guide for MacBook Air M1 A2337 (820-02016). Diagnose no power on Apple Silicon logic boards — PPBUS_G…
Level 3 →
Apple Logic Boards
MacBook Air A1932 Not Charging Repair — CD3215 USB-C, No Power (820-01521)
820-01521
Board-level repair guide for MacBook Air A1932 2018 (820-01521). Fix no power and not charging via CD3215 USB-C PD contr…
Level 3 →
Apple Logic Boards
MacBook Air A1466 No Power Repair — PPBUS_G3H Short, ISL6259, Liquid Damage (820-3437)
820-3437
Board-level repair guide for MacBook Air A1466 (820-3437-B). Diagnose PPBUS_G3H shorts, ISL6259 charging faults and liqu…
Level 3 →
Apple Logic Boards
MacBook Pro 820-3209-A No Power Repair — NVIDIA GPU, SMC, PPBUS (A1278 / A1286)
820-3209
Board-level repair guide for MacBook Pro 820-3209-A (A1278, A1286, 2011–2012). Fix no power, NVIDIA GPU failures, SMC fa…
Level 3 →
Apple Logic Boards
MacBook Pro A1502 No Power Repair — PPBUS_G3H, ISL6259, LP8550 Backlight (820-3476 / 820-4924)
820-3476
Board-level repair guide for MacBook Pro A1502 (820-3476, 820-4924). Diagnose no power with PPBUS_G3H voltage map, ISL62…
Level 3 →
Technical Resources

Repair Knowledge Base

Repair glossary, real-world case studies with full diagnostic process — updated continuously.

Glossary 10 terms — key terms explained Repair Case Studies 1 cases — documented repairs Schematics & Boardviews Availability index — filterable
Tools & Equipment
Got the right tools for Level 3?

Board-level repair requires precise equipment: hot air stations, oscilloscopes, DC power supplies. See the curated list used in these guides.

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Repair Case Studies

1 documented board-level repairs — full diagnostic process, measurements and fix.

All cases →
820-01521 820
MacBook Air A1932 820-01521 — No Battery Support, Full Fan Speed, Internet Recovery Loop Fix
Fix MacBook Air A1932 820-01521 booting only on AC, full fan speed, and Internet Recovery Wi-Fi loop caused by a non-ori…
→ Browse all case studies
Documented board-level repairs with full diagnostic process, measurements and fix.

Latest articles

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USB-C Power Meter: Indispensable Tool for MacBook Repair
Essential USB-C power meter techniques for MacBook repair. Measure delivery voltage, current draw, and diagnos…
Common Mistakes to Avoid When Repairing Smartphones
Critical mistakes smartphone repair technicians make. Avoid ESD damage, wrong voltage rails, backlight filteri…
BoardView Software: OpenBoardView and Alternatives
Technical review of BoardView software tools: OpenBoardView, Altium Viewer, KiCAD alternatives. Board-level re…
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Diagnostic methods, components explained, tools, workshop tips.
Board lookup →