 Apple Technician Guide MacBook Pro (15-inch, Mid ... - tim.id.au

2010-08-05
3. Disconnect any peripheral
devices, cards, or cables
attached to the unit. Verify the
noise is gone.
4. Locate the source of the noise.
Verify if the noise comes from
the optical drive usage.
5. Verify if the noise comes from
the hard drive.
6. Verify if the noise is coming
from the fan.
7. Noise maybe related to
interference from other
electrical devices operating
near the computer, or on the
same AC power source. Verify if
noise is gone when operating
in a different location on a
different AC circuit.
Yes Check for possible ground
loop.
No Go to step 6
Yes Check with a different media
disc. Possible issue with disc
label or out of balance media.
If not related to media, and
noise is above normal level,
replace optical drive.
No Go to step 5
Yes It is normal for drives to
produce noise when they
spin up or the heads move.
Replace drive if noise is above
normal levels.
No Go to step 6
Yes The fan(s) are generally
running in a slow mode,
but may accelerated when
intensive processing is
required (calculation, 3D
gaming, or screen saver
animation). If still beyond
expected sound level, check
for interference of fan with
other mechanical element of
system (foam, bracket, shield)
before replacing a noisy fan.
MacBook Pro (15-inch, Mid 2010) Symptom Charts — Startup and Power Issues 47
J04
H06
X03
No Go to step 7. P04
Yes Perhaps operating the unit
with a surge suppressor will
eliminate or reduce the noise.
Change location of use or
limit use of other device that
is inducing the noise.
No Replace logic board. M99