Learn board-level repair
Repair guides — page 3
Practical, bench-tested guides: reading schematics, using boardview software, BIOS programming, power circuits and step-by-step diagnostics. Each guide explains what to measure, in what order and why.
- BIOS
Serial Number, UUID and MAC Address in BIOS: How to Preserve Them
Where a laptop's serial number, system UUID, MAC address and licence key live in the BIOS chip, and how to carry them over when you write a replacement image.
- Tools
Preheaters for Laptop Board Work: When You Need One
Preheaters for laptop board rework: why bottom heating helps, IR, hot-plate and hot-air types, sensible temperatures, supporting the board and protecting parts.
- Reading Schematics
Power Sequence Pages in Laptop Schematics Explained
How to read the power sequence chart in a laptop schematic, stage by stage from adapter to platform reset, and turn it into a checklist for no-power faults.
- Power Circuits
Power Good Signals and Why They Matter
What power-good signals are, how regulators report a healthy rail, how PG chains drive the laptop power sequence, and how to find a power-good that never goes high.
- Components
Polymer and Tantalum Capacitors: Failure Modes on Laptop Boards
How polymer and tantalum capacitors fail on laptop boards: shorts, rising ESR and lost capacitance, burning tantalums, polarity marks, and choosing replacements.
- Tools
Oscilloscope Basics for Laptop Board Repair
Oscilloscope basics for laptop repair: what a scope adds to a multimeter, bandwidth and probes, triggering, and checking switch nodes, clocks, ripple and timing.
- Boardview
OpenBoardView: Installation and First Steps
Install OpenBoardView on Windows, Linux or macOS, open your first boardview, search parts and nets, flip the board and set it up for everyday repair work.
- Diagnostics
No Backlight on a Laptop Screen: Diagnosis Guide
How to diagnose a laptop screen with an image but no backlight: the flashlight test, backlight power, enable and PWM signals, the lid sensor, fuse and panel checks.
- Reading Schematics
Understanding Net Names and Signal Labels in Laptop Schematics
How to decode net names like +3VALW, +5VS, PP3V42_G3H, PLTRST# and EC_ON: rail prefixes, power-state suffixes, active-low marks and differential pairs.
- Multimeter
Multimeter Modes and Symbols Explained
What each symbol on a multimeter dial and display means — volts, ohms, diode, continuity, capacitance, current, REL, HOLD, MIN/MAX — and which ones repair needs.
- Multimeter
Multimeter Mistakes That Damage Laptop Boards (and How to Avoid Them)
The multimeter mistakes that damage laptop boards or mislead diagnosis: probe slips, current mode on rails, measuring powered boards in ohms, poor grounds and more.
- Brands
MSI Gaming Laptop Motherboard Repair Basics
Repairing MSI gaming laptop boards: MS- codes and revisions, heavy CPU and GPU power stages, heat-related faults, EC firmware and keyboard controllers.
- Brands
Microsoft Surface Motherboard Repair: The Challenges
Why Microsoft Surface motherboard repair is hard: glued construction, M1 part numbers, Surface Connect charging, soldered storage, firmware and common faults.
- Brands
MacBook Logic Board Numbers (820-xxxxx) Explained
How Apple's 820- logic board numbers work, how they relate to model and EMC numbers, revision letters, 051- schematic numbers, and T2 and Apple silicon changes.
- Power Circuits
Load Switches and Rail Gating on Laptop Motherboards
Load switches and rail gating on laptop boards: integrated switches and discrete MOSFETs, enables, slew rate and discharge, and how to diagnose a gated rail.
- Brands
Lenovo ThinkPad Motherboard Repair: What Makes It Different
What makes ThinkPad motherboard repair different: FRU and board codes, service manuals, USB-C charging faults, fan errors, liquid paths and EC firmware.
- Brands
Lenovo IdeaPad and Legion Boards: Reading NM- Codes
Lenovo IdeaPad and Legion boards and their NM- codes: reading LCFC codes, variants behind one code, FRU numbers, Novo and reset holes, and common fault areas.
- Power Circuits
LDO Regulators on Laptop Boards
LDO regulators on laptop boards: how linear regulators work, where boards use them, dropout and stability, heat, and how to diagnose a missing or hot LDO rail.