Apple Macbook Pro Aluminum 13-Inch Black Laptop Keyb Technical Guide - Page 106

Knowledge Base HT1778, Knowledge, Base TS1473, applications? See Runaway

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Page 106 highlights

Deep Dive Check Result 1. Is the system running as Yes expected (compared to similar system)? No 2. Are there runaway Yes applications? See "Runaway applications can shorten battery run time" (Knowledge Base TS1473). No 3. Fans are typically on at Yes minimum speed. Perform SMC reset or remove all power No for 15 minutes. Is the fan(s) running properly? 4. Reseat fan connection to logic Yes board or test a known-good fan. Replace a fan that is not spinning or replace logic board that is not spinning a known- good fan. Is fan(s) working No properly? 5. Is the heatsink installed Yes properly with no damage to heat fins? No 6. Is the system running as Yes expected? No 7. Heatsink thermal grease Yes possibly missing or improperly installed during previous repair? No Action Code Use "Apple Portables: Operating Temperature" (Knowledge Base HT1778) to inform user it is operating normally. Go to step 2. Check with the vendor for compatibility and software update. Go to step 3. Go to step 5. Fan(s) not running or always running at full speed. Go to step 4. Reseating or replacing bad X99 fan resolved issue. Replace or logic board if it does not work M18 with known-good fan. Go to step 5. Go to step 7. Replace missing screws or damaged heatsink. Go to step 6. Heatsink installed incorrectly. X10 Issue resolved. Go to step 7. Replace heatsink or install X10 thermal grease. Go to step 8. 2008-09-18 MacBook(13-inch,Aluminum,Late2008)-SymptomCharts/MechanicalIssues:ThermalsandEnclosure 106

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MacBook
(13-inch,
Aluminum,
Late
2008)
—
Symptom
Charts
/
Mechanical
Issues:
Thermals
and
Enclosure
106
2008-09-18
Deep Dive
Check
Result
Action
Code
1.
Is the system running as
expected (compared to similar
system)?
Yes
Use “Apple Portables:
Operating Temperature”
(
Knowledge Base HT1778
)
to inform user it is operating
normally.
No
Go to step 2.
2.
Are there runaway
applications? See “Runaway
applications can shorten
battery run time” (
Knowledge
Base TS1473
).
Yes
Check with the vendor for
compatibility and software
update.
No
Go to step 3.
3.
Fans are typically on at
minimum speed.
Perform
SMC reset or remove all power
for 15 minutes.
Is the fan(s)
running properly?
Yes
Go to step 5.
No
Fan(s) not running or always
running at full speed.
Go to
step 4.
4.
Reseat fan connection to logic
board or test a known-good
fan.
Replace a fan that is not
spinning or replace logic board
that is not spinning a known-
good fan.
Is fan(s) working
properly?
Yes
Reseating or replacing bad
fan resolved issue.
Replace
logic board if it does not work
with known-good fan.
X99
or
M18
No
Go to step 5.
5.
Is the heatsink installed
properly with no damage to
heat fins?
Yes
Go to step 7.
No
Replace missing screws or
damaged heatsink. Go to step
6.
6.
Is the system running as
expected?
Yes
Heatsink installed incorrectly.
Issue resolved.
X10
No
Go to step 7.
7.
Heatsink thermal grease
possibly missing or improperly
installed during previous
repair?
Yes
Replace heatsink or install
thermal grease.
X10
No
Go to step 8.