Apple Mac Pro - Page 36

Mac Pro (Mid 2010) General Troubleshooting — Minimum Conguration Testing 36
2010-08-31
panel board, power button, and cable, instead of jumpering SYS_PWR solder pads.
9. Reconnect internal speaker. Reinstall a processor and heatsink in processor A connector, and
one known good and compatible Apple memory DIMM in slot 1.
Notes:
• The Mac Pro won’t start if you use processor B only on a dual-processor board. Use
processor A connector.
• Verify no damaged pins on DIMM or processor connectors or mating connector of
processor board and backplane board.
• Verify no damaged heatsink thermal sensor and fan connector pins or mating connector on
the processor board. If there is damage, all Mac Pro fans will ramp to 100% when power ON.
• Verify no grime or foreign debris is causing contact issues on DIMM, processor connectors,
and connectors on processor board and backplane board.
10. Connect AC power cord. Press the DIAG button to verify the 5V STBY LED illuminates. (This is
a verication step, as you’ve added modules since previous step.)
11. Power Mac Pro ON either by PWR_ON solder pads or front panel board.
Expected behavior:
• The red-colored error LED on the processor board next to the memory slots at processor A
should ash once only as the Mac Pro powers on.
• Startup tone heard (if not, reset PRAM and retest)
• Front and rear processor cage fans (and PCIe fan, if installed) should spin slowly
Notes:
• If using dual-processor board, both the LEDs next to the memory slots should ash once
only.
• You can test both processors independently using processor A connector only.
12. Disconnect AC power cord. Install a known-good hard drive with a compatible/bootable
Mac OS installed.
Notes:
• Verify no damaged SATA data or power pins on drive and mating connector on backplane
board.
• Verify no grime or foreign debris is causing contact issues on SATA data or power pins on
drive and mating connector on backplane board.
13. Connect AC power cord. Power Mac Pro on by PWR_ON solder pads or front panel board.
Expected behavior:
Listen for sound of hard drive boot. If no indication of hard drive boot, try drive in another bay.
Note:
Shortly after boot start, verify that a red-colored LED is illuminated within the optical audio-out
jack at the rear of the Mac Pro. If so, software drivers have been loaded.
14. Disconnect AC power cord. Install a known good compatible PCIe graphics card into slot 1
and attach a known good display.