Apple Macbook Pro Aluminum 13-Inch Black Laptop Keyb Technical Guide - Page 34

Intermittent Shutdown, Troubleshooting Shutdown Issues

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2010-06-15 Intermittent Shutdown Unlikely cause: hard drive, optical drive Troubleshooting Shutdown Issues Before troubleshooting shutdown issues, always do the following: • Run the available Apple diagnostics to check for cause of previous shutdown(s). Running ASD also helps isolate any abnormal value reading from a thermal, voltage, or current sensor or from a fan speed meter. • Collect all available information from the user on shutdown details: periodicity, power state when issue happens, running applications, running time before shutdown. User-related shutdowns A computer shutdown may be caused by user operation. Shutting down the computer (by selecting the Shut Down menu, by pressing 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. Suggested steps for troubleshooting: • Reset SMC. • Check Energy Saver preferences settings. • Test top case button and magnetic sleep sensor operation and secure connection to logic board. Activity-related system shutdowns These shutdowns are linked to system settings, devices drivers, applications, or operating system freezes. • System could not finish the standard shutdown process and had to force shutdown. • An installed watchdog detected that an application did not respond within the specified time. (This watchdog can be enabled in Mac OS X Server Energy Saver preferences.) Suggested steps for troubleshooting: • Check the system logs and activity monitor utility for clues on the freezing process. • Check for available software and firmware updates for installed device drivers, applications, or operating system. • Start the system from a known-good and up-to-date bootable drive for issue reproduction. Power-related system shutdowns These shutdowns are due to power management, poor connections or defective power sources. • External or battery power source was removed. • Battery went empty while computer was on. • Battery went empty while computer was asleep. MacBook (13-inch, Aluminum, Late 2008) Symptom Charts - Startup and Power Issues 34

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MacBook (13-inch, Aluminum, Late 2008) Symptom Charts — Startup and Power Issues
34
2010-06-15
Intermittent Shutdown
Unlikely cause:
hard drive, optical drive
Troubleshooting Shutdown Issues
Before troubleshooting shutdown issues, always do the following:
•
Run the available Apple diagnostics to check for cause of previous shutdown(s). Running
ASD also helps isolate any abnormal value reading from a thermal, voltage, or current
sensor or from a fan speed meter.
•
Collect all available information from the user on shutdown details: periodicity, power state
when issue happens, running applications, running time before shutdown.
User-related shutdowns
A computer shutdown may be caused by user operation. Shutting down the computer (by
selecting the Shut Down menu, by pressing 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.
Suggested steps for troubleshooting:
•
Reset SMC.
•
Check Energy Saver preferences settings.
•
Test top case button and magnetic sleep sensor operation and secure connection to logic
board.
Activity-related system shutdowns
These shutdowns are linked to system settings, devices drivers, applications, or operating
system freezes.
•
System could not finish the standard shutdown process and had to force shutdown.
•
An installed watchdog detected that an application did not respond within the specified
time. (This watchdog can be enabled in Mac OS X Server Energy Saver preferences.)
Suggested steps for troubleshooting:
•
Check the system logs and activity monitor utility for clues on the freezing process.
•
Check for available software and firmware updates for installed device drivers, applications,
or operating system.
•
Start the system from a known-good and up-to-date bootable drive for issue reproduction.
Power-related system shutdowns
These shutdowns are due to power management, poor connections or defective power
sources.
•
External or battery power source was removed.
•
Battery went empty while computer was on.
•
Battery went empty while computer was asleep.