[A machine] vibrates [when
and how]. A diagnostic order:
what to check first, what each
frequency implicates, and which
cause is dangerous rather than
annoying.

Diagnose a Vibration

Ordered by what to check first and what's actually dangerous.

Prompt

Something in [a machine] vibrates at [describe when and how]. Give me a diagnostic order — what to check first, what each frequency would implicate, and which cause is dangerous rather than merely annoying.