The LEDs are located under hard drive bay 1 on the backplane board. Note: When connecting the Mac Pro to AC power, verify that the LEDs for OVTMP CPUA and OVTMP CPUB briefly flash red (less than 0.5 sec). Attach a known good power cord from a known good AC source to the Mac Pro. Processor tray and processor board (containing processors, processor heatsinks, and memory)ĭisconnect all cables from the backplane board, except the power supply.Ģ.Remove the following items from the Mac Pro: Take Mac Pro Down to Minimum Configurationġ.
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Refer to other troubleshooting sections in this manual for additional direction. Note: Minimum configuration testing may not be practical for every repair. Backtrack to the previous step, remove the last installed module, and re-verify the expected behavior. If you encounter unexpected behavior during a step, you should investigate the last module you re-installed.
This method may also help you discover a loose or faulty cable or connector. The goal is to identify which module(s) cause a symptom to recur when they are added. This approach helps determine which modules function together. The method gradually builds up the system from a minimum configuration and verifies expected behaviors at each step. The following procedure can help you troubleshoot a “No Power” or other startup related symptom. If computer power remains stable, the power issue is resolved. There is no other activity since there are no processors. You can tell if the computer has started up by fans and LEDs. Press power button and verify computer turns ON.
Reconnect the processor board without processors. Reinstall modules until symptom reappears. Yes Suspect a module that has been removed. Verify the 5V STBY LED illuminates when you press the DIAG button on the backplane board. Reduce computer to minimal configuration. To verify power button, go to Power Button Stuck.ĥ. Yes Front panel board or power button failure.