MacBook Pro (13-inch) Symptom Charts — Startup and Power Issues 39
2010-09-14
1. User-related shut downs
A computer shut down event may be caused by user operation. Shuttting down the computer
(by selecting the Shutdown menu, by keeping pressed the power button for at least 4 seconds,
or by programming a timed shutdown in the Energy Saver preferences) should not be
considered as a failure unless the power button or the magnetic sleep sensors are found to be
defective, so the suggested steps for troubleshooting will be:
• to reset the SMC,
• to check Energy Saver preferences settings,
• to test top case button and magnetic sleep sensor operation and secure connection to logic
board.
2. Activity-related system shut downs
• system could not succeed the standard shutdown process and had to force shutdown,
• an installed watchdog detected that an application did not respond within specied time
(this watchdog can be enabled on Mac O X Server Energy Saver preferences)
These shut downs may be linked to system settings, devices drivers, applications or operating
system freezes, so the suggested steps for troubleshooting will be:
• to check the system logs and activity monitor utility for clues on the freezing process,
• to check for available software and rmware updates for installed device drivers,
applications, or operating system,
• to start the system from a known-good and up-to-date bootable drive for issue
reproduction.
3. Power-related system shut downs
• External or battery power source was removed,
• Battery went empty while computer was on,
• Battery went empty while computer was asleep,
These shut downs are due to power management, poor connections or defective power
sources so the suggested steps for troubleshooting will be:
• to reset SMC,
• to check secure AC cable, AC adapter and battery connections to logic board,
• to verify the battery and power adapter sources using the Notebook Battery and Adapter
Diagnostic.
4. Hardware-related system shut downs
• one of the temperature sensors reached a specied temperature limit,
• one of the voltage sensors reached a specied voltage limit,
• one of the current sensors reached a specied current limit,
These shut downs are due to temperature, voltage, current, fan speed or other hardware-related
sensor values getting out of range, so the suggested steps for troubleshooting will be:
• to check for all sensors connections and values using the Apple Service diagnostics and
other available Apple Service utilities,
• to check for usage of Apple branded battery and power adapter,
• to check for abnormal battery temperature,
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