4 Replies Latest reply: Sep 9, 2010 4:03 PM by The hatter
Jens Peermann Level 1 (25 points)
I cannot turn on my Mac Pro anymore. It was in sleep mode - monitors only, not HD - and didn't wake up when I pressed a key on the keyboard. So I pushed the power button until the LED went out and then pushed it again to turn on the machine.

The LEDs on the memory banks lit up for a fraction of a second, much shorter than they normally do. A brief whistle sound came on. The UPS display indicated a power draw of 9 Watts, then 8,7,6 and so on until it hit 0. Pressing the power button again didn't do anything. When I removed the power cord and reconnected it again, pressing the power button resulted in the same as above.

This seems to point to the power supply, doesn't it?

Mac Pro 1.1, iBook G4, MacBook, Mac OS X (10.5.8)