Apple Technician Guide - tim.id.au
Apple Technician Guide - tim.id.au
Apple Technician Guide - tim.id.au
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2010-08-05<br />
2. Use the Sound Output system<br />
preference to test the left<br />
and right speakers. If lower<br />
bass notes are distorted, right<br />
speaker/subwoofer may be<br />
defective. Are all speakers free<br />
of distortion, sounding clear<br />
and loud?.<br />
3. Is affected speaker cable<br />
properly inserted and free<br />
from damage?<br />
4. Is affected speaker membrane<br />
free from dust or debris, and<br />
speaker membrane is not<br />
deformed/damaged?<br />
5. Verify that speaker enclosure<br />
is not damaged, correctly<br />
installed in system, and does<br />
not create unneeded vibration<br />
when sound is played.<br />
6. Verify that internal speakers<br />
no longer produce distorted<br />
sound.<br />
Yes Issue resolved.<br />
No Adjust volume to test full<br />
range of volume settings. Go<br />
to step 3.<br />
Yes Go to step 4.<br />
No Reseat speaker cable or<br />
replace damaged speaker. Go<br />
to step 5.<br />
Yes Go to step 5.<br />
No Clean any dust or debris. Go<br />
to step 5.<br />
If membrane is damaged,<br />
replace the bad speaker(s).<br />
Yes Speaker housing and<br />
installation is good. Go to<br />
step 6.<br />
No Properly install or replace<br />
affected speaker. Go to step<br />
6.<br />
MacBook Pro (15-inch, 2.53 GHz, M<strong>id</strong> 2009) Symptom Charts — Input/Output Devices 106<br />
X09<br />
X09<br />
Yes Issue resolved. X09<br />
No Replace logic board. M09
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