Board Repair Archives - Tech Bench Lab

How to Read a Boardview: the Rail-Naming Grammar, Decoded From 7 Official Schematics

Framework publishes seven official Laptop 13 mainboard schematics under CC BY 4.0. We extracted 532 power nets from them and found two different rail-naming dialects in the same repository.

Sep 9, 2026 10 min read

MacBook Air M2 (A2681) Power Sequence: Every Rail, and the One With No Correct Voltage

Every rail on the MacBook Air M2 board (A2681 / 820-02536) by power domain: expected voltage, diode reading, and how often 18 repair threads cite it.

Sep 7, 2026 10 min read

Multimeter probes testing a MOSFET on a circuit board

MOSFET Gate Threshold vs. Your Multimeter: 17 Datasheets and the Good Parts That Fail the Test

The four-step bench test for MOSFETs: body diode, gate isolation and the switch test that proves a part is good — plus the gate-charge mistake that gets healthy FETs thrown away.

Aug 16, 2026 9 min read

Category: <span>Board Repair</span>

How to Read a Boardview: the Rail-Naming Grammar, Decoded From 7 Official Schematics

MacBook Air M2 (A2681) Power Sequence: Every Rail, and the One With No Correct Voltage

MOSFET Gate Threshold vs. Your Multimeter: 17 Datasheets and the Good Parts That Fail the Test