Board-Level Repair Practice
An ongoing repair practice built around fixing boards rather than swapping them. Power rail tracing, short-circuit localisation, BGA and hot-air rework, and recovery of devices that arrive classified as scrap.
- Role
- Repair engineer
- Timeline
- Jan 2018 — Present
- Status
- live
The problem
The default economics of laptop repair push everything toward board replacement, and board replacement pushes working hardware toward scrap. A device with one failed component on a power rail becomes a whole-unit write-off — an expensive outcome commercially and a wasteful one environmentally.
Research
Working from schematics and boardviews rather than symptom lists. The method is to reason from the power sequencing: what rail should be present at what point, what enables it, and where the sequence actually stops. That turns 'it does not turn on' into a specific node on a specific rail.
The solution
Diagnose to component level, repair at component level. Short localisation on the failing rail, injection and thermal imaging to find the fault physically, then rework — replacement of individual components, connector and pad repair, BGA work where the fault is under a package.
Result
Devices that arrive graded for parts return to resale condition. Within the disposition business this changes the grading decision directly: the difference between scrap and refurbished is often one component, and the capability to make that call in-house is what makes the grade meaningful.
What I took from it
Reason from the power sequence, not from the symptom. The symptom is the end of the chain.
The repair capability and the grading decision are the same decision. Knowing what can be fixed changes what gets written off.