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Mac mini (Late 2009) Symptom Charts — Mechanical 83
2010-08-03
Mechanical
Noise/Hum/Vibration
Quick Check
Symptoms Quick Check
Noise/Hum/Vibration
• Buzzing noise
• Rattling noise
• Ticking noise
• Squeaking noise
1. Verify that the vents on the bottom system are
free of dust and other obstructions that might
inhibit proper airow through the system. .
2. Launch Applications/Utilities/Activity Monitor.
Determine whether an application or process is
consuming a high percentage of CPU bandwidth.
CPU intensive applications can cause the fans
to run fast in order to maintain the proper
internal system temperatures. If needed, quit the
application or restart the system to resolve the
issue.
3. Play sound sample at loud and soft volume
levels to determine if the noise is caused by the
speaker or the amplier circuit. Jump to ‘Distorted
sound from built-in speaker’ symptom ow for
additional information.