Apple Technician Guide MacBook Pro (17-inch, Mid ... - tim.id.au
Apple Technician Guide MacBook Pro (17-inch, Mid ... - tim.id.au
Apple Technician Guide MacBook Pro (17-inch, Mid ... - tim.id.au
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2010-06-11<br />
Intermittent Shutdown<br />
Unlikely c<strong>au</strong>se: hard drive, optical drive<br />
Troubleshooting Shutdown Issues<br />
Before troubleshooting shutdown issues, always do the following:<br />
• Run the available <strong>Apple</strong> diagnostics to check for c<strong>au</strong>se of previous shutdown(s). Running<br />
ASD also helps isolate any abnormal value reading from a thermal, voltage, or current<br />
sensor or from a fan speed meter.<br />
• Collect all available information from the user on shutdown details: periodicity, power state<br />
when issue happens, running applications, running <strong>tim</strong>e before shutdown.<br />
User-related shutdowns<br />
A computer shutdown may be c<strong>au</strong>sed by user operation. Shutting down the computer (by<br />
selecting the Shut Down menu, by pressing the power button for at least 4 seconds, or by<br />
programming a <strong>tim</strong>ed shutdown in the Energy Saver preferences) should not be cons<strong>id</strong>ered as<br />
a failure unless the power button or the magnetic sleep sensors are found to be defective.<br />
Suggested steps for troubleshooting:<br />
• Reset SMC.<br />
• Check Energy Saver preferences settings.<br />
• Test top case button and magnetic sleep sensor operation and secure connection to logic<br />
board.<br />
Activity-related system shutdowns<br />
These shutdowns are linked to system settings, devices drivers, applications, or operating<br />
system freezes.<br />
• System could not finish the standard shutdown process and had to force shutdown.<br />
• An installed watchdog detected that an application d<strong>id</strong> not respond within the specified<br />
<strong>tim</strong>e. (This watchdog can be enabled in Mac OS X Server Energy Saver preferences.)<br />
Suggested steps for troubleshooting:<br />
• Check the system logs and activity monitor utility for clues on the freezing process.<br />
• Check for available software and firmware updates for installed device drivers, applications,<br />
or operating system.<br />
• Start the system from a known-good and up-to-date bootable drive for issue reproduction.<br />
Power-related system shutdowns<br />
These shutdowns are due to power management, poor connections or defective power<br />
sources.<br />
• External or battery power source was removed.<br />
• Battery went empty while computer was on.<br />
• Battery went empty while computer was asleep.<br />
<strong>MacBook</strong> <strong>Pro</strong> (<strong>17</strong>-<strong>inch</strong>, <strong>M<strong>id</strong></strong> 2010) Symptom Charts — Startup and Power Issues 30
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