Dead Board? The First 5 Checks — One-Page Triage Guide for Electronics Repair | Printable PDF

Most "dead" boards fail one of the same five checks.

Before the scope leaves the shelf, run this triage: look, rails, fuses, heat, ground. This one-page guide gives you the five checks in the right order, the readings that lie to beginners, and a table of what normal looks like — so you stop staring at dead boards and start narrowing.

What's inside:

- The five first-pass checks, in order, with exactly what to look and measure for

- Why you measure power rails at the board, under load — not at the supply

- How a perfect-looking fuse can be open, and the 5-second test that proves it

- Four readings that lie: ghost voltage, in-circuit resistance, unloaded supplies, bad leads

- A "what normal looks like" reference table for fuses, rails, grounds, and switches

- Pre-work habits: photos before touching, capacitor discharge, ESD, the failure story

Who it's for: beginner and intermediate technicians, hobbyists, and repair professionals who want a repeatable process instead of guesswork.

Format: 1-page PDF, US Letter, print-ready. Instant download.

Part of The Circuit Toolkit's one-page troubleshooting series — from 15+ years of real bench experience.

*Educational reference. De-energize and discharge before probing. Never work on energized mains or high-voltage equipment.*