MacBook Pro (13-inch) Symptom Charts — Startup and Power Issues 40
2010-09-14
• to check for fan(s) operation,
• to check for cleanliness of the heat sink ns and the air ows,
• to check for correct seating of the heat sink on logic board and presence of thermal transfer
material.
Quick Check
Symptom Quick Check
Intermittent shutdown
• Powers o during startup
• Powers o with desktop use
1. Collect details from user on shutdown occurrence
and system conguration when it happens (on
battery, when running for a while, frequency
of shutdowns, running applications, shutdown
repeatability). If shutdown can be easily
reproduced, check next steps:
2. Verify battery charge status
3. Check AC adapter MagSafe connector and
connection with system
4. Reset SMC and PRAM
5. Start up with shift key down for safe mode
6. Startup from known-good bootable device
7. Run ASD for sensors + thermal tests
Deep Dive
Check Result Action Code
1. Activity related shutdowns:
Reset SMC and PRAM and
verify that shutdown issue still
happens.
Yes Check with known-good
bootable drive. Go to step 2.
No Shutdown cause was related
to SMC or PRAM programmed
shutdown settings or
corruption, and was resolved
by reverting them to default
settings.
2. Booting from known-good
bootable drive, verify that
shutdown issue still happens.
Yes Go to power-related
shutdowns on step 3.
No Shutdown events do not
happen on known-good OS.
Reinstall Mac OS on user
hard drive, update OS with
latest version and check if any
rmware update is available.
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