Apple Technician Guide MacBook Pro (17-inch, Early 2009) - tim.id.au

2010-06-11
2. Remove battery and AC power
for 30 seconds to perform a
manual SMC reset. Apply AC
power. Does power-on key
work when pressed?
3. Inspect keyboard flex cable for
loose or damaged connections.
Align and reseat to flex cable
to ensure proper connections.
Does power-on key now work
correctly?
4. Use conductive tool to assert
power on by touching poweron
switch pads on logic board.
5. Disconnect the internal
keyboard flex cable and assert
power-on switch pads on logic
board. Removing top case
power-on key from circuit
should free on-board switch to
work properly.
System Runs Hot
Unlikely cause: LCD, hard drive, optical drive
Quick Check
Symptom Quick Check
System Runs Hot
• System feels very warm
• Fan(s) not working
• Fan(s) are full on
Yes SMC restored from power
removal sequence. Power-on
key now working properly.
No Power-on key stuck or open.
Go to step 3.
Yes Cable reseat restored poweron
key operation.
No Power-on key still stuck or
open. Go to step 4.
Yes System powers on suggests
top case power on key circuit
is open. Replace top case.
No Power-on key circuit may be
closed suggesting a stuck
power-on key. Go to step 5.
Yes On board power-on switch
pads now starts the system.
Replace top case due to stuck
power-on key.
No Go to M01: No power/ not
booting
1. Verify the computer operating on a flat, hard
surface and the vents are not blocked.
X14
X14
2. Verify the computer is not running hotter than
expected for normal operation. If possible,
compare to a similarly configured computer.
3. Reset SMC.
4. Inspect fan performance
5. Run thermal sensor test.
MacBook Pro (17-inch, Early 2009) 109