Apple Mac mini Late 2009 (Technician Guide) - Manual (Page 51)

Mac mini (Late 2009) Symptom Charts — Mass Storage 51 2009-11-03
With hard drive removed and 8.
no media in the optical drive,
boot from an external volume
and determine if the noise is
caused by media in the optical
drive.
Yes Go to J04 Optical Drive Noisy.
No Go to step 9.
With replacement hard drive 9.
installed verify whether noise
level is noticeably quieter than
customer’s hard drive.
Yes Customer hard drive noise
level is similar to a known
good one and does not
require repair.
No Replace customer’s hard drive.
Return system to customer.
H06