Apple LATE 2009 Laptop User Manual


 
Mac mini (Late 2009) Symptom Charts — Mechanical 76
2009-11-03
Mechanical
Noise/Hum/Vibration
Quick Check
Symptoms Quick Check
Noise/Hum/Vibration
Buzzing noise
Rattling noise
Ticking noise
Squeaking noise
Verify that the vents on the bottom system are 1.
free of dust and other obstructions that might
inhibit proper airow through the system. .
Launch Applications/Utilities/Activity Monitor. 2.
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.
Play sound sample at loud and soft volume 3.
levels to determine if the noise is caused by the
speaker or the amplier circuit. Jump to ‘Distorted
sound from built-in speaker’ symptom ow for
additional information.