Mac Pro (Mid 2010) Symptom Charts — Intermittent Shutdown 45
2010-08-31
Intermittent Shutdown
Unlikely cause: Optical drive(s), hard drive(s), fans, memory, processors, PCIe cards, speaker,
AirPort card, Bluetooth card
Quick Check
Symptoms Quick Check
Intermittent Shutdown
• Computer intermittently shuts
down, restarts, sleeps
• Fans run fast
• Slow computer performance
prior to intermittent shutdown,
restart, sleep
1. Conrm known good AC power source, and a
known good power cord is fully inserted into the
back of the computer
2. Reset SMC
3. Power ON the computer
4. After power ON, verify front panel power/sleep
LED illuminated, and not ashing any error
sequences indicating a memory failure.
5. Startup from known good compatible boot
device with ‘Shift’ key to boot into safe mode.
6. Check system.log in the Console to identify
possible shutdown causes. If the computer won’t
stay ON for long enough, place the customers’
hard drive into a known-good computer and
retrieve the logs.
7. Conrm Energy Saver Settings, check for
scheduled shutdown/startup/sleep times
8. Run AHT/ASD for sensor/fan thermal tests. Reset
SMC by unplugging the AC power cord for 15
seconds. Reconnect the power cord ensuring
the power button is not being pressed. After 5
seconds press the power button and verify if the
computer turns on.
To Next Page
Loading...
