Panic-full code library
Watchdog timeout vs SMC panic: what to test before replacing parts
A watchdog timeout describes a missed software-service check-in; an SMC panic describes a system-management assertion. Both can originate in hardware, but the evidence you extract and the next test are different.
First diagnostic path
- For watchdog: capture the named service and restart interval.
- For SMC: capture the assertion and sensor array.
- For both: verify the exact device model and recent repair history.
Other causes to keep in scope
- A missing peripheral may trigger either family through different paths.
- Shared power or bus damage can create several secondary symptoms.
- Incomplete logs can hide the distinguishing context.
How CoreMatch uses this signature
The analyzer combines this token with the panic family, exact device model and compatible verified evidence. It ranks a likely component only when those signals agree, then provides confirmation steps.
Important limitation
Classify the panic family before applying a parts list; similar restart symptoms do not imply the same diagnosis.