Watchdog timeout vs SMC panic: similar symptoms, different evidence

For a watchdog log

• Extract the named service and timing.
• Preserve accompanying sensor or endpoint text.
• Compare several recent logs for repeatability.

For an SMC log

• Preserve the complete assertion and sensor array.
• Decode only exact-model mappings.
• Look for shared power, bus and connector dependencies.

Where causes can overlap

A missing peripheral, damaged connector, shared rail or communication fault can surface through different panic families. An incomplete log can also hide the context that distinguishes them.

Reversible decision path

• Classify the panic before choosing a parts list.
• Inspect and reseat evidence-supported paths.
• Use correct known-good assemblies and measurements before board work.

Model and evidence limit

Confirm the exact device model and recent repair history. The panic family selects the investigation method; physical testing confirms the component.