Apple Power Mac G5 Desktop "power off" Questions

how to reboot imac after installing Yosemite did almost evertything power off then on option key down power off then on command & R same with R & P power off then on command V

...off hit power button again power comes on but light goes off tried all combonations on key board to trigger a restart but i dont think the key board is registering no lights come on the key board ...

...Power goes on and off.. Just MacPro won't boot.. Power goes on and off.. Just installed an itunes update..Flash message about cache and now the power wont stay on pull it all the power cables of and ...

...power interruption. * If the iMac G5 shuts off again, try these steps, another recommendation would be to remove all connections including the power cord, and lay the iMac G5 on soft cloth face down ...

...together this happened Clean your memory card. its edge connector with soft eraser both side. Do this after you power off the unit and unplug to wall socket. Take out the memory and do the

off? The easiest way to resolve this problem should be to reset the SMC - System Management Controller - which deals with how power is distributed to various parts of your Mac, including the fans. How

power off and disconnect everything....wait 10 minutes....reconnect everything....push in and hold tower power button....while holding button turn power supply on.....continue to hold for 10 seconds..

my g5 keeps switing off,i've tryed mac-boot.still switching off. powermac G5's are notorious for having bad power supplies. you might need to find a way to replace the power supply

...this afternoon. After power came back up the Xeon would not power down or boot up. I can't turn it off even by pressing down the power key for more than 15 seconds. Have you tried unplugging

...what's going on? You dont switch off by power Button. You go to the apple logo on Top-Left of Window,scroll down to "Shut down" Every else goes from self There is also the solution "Restart"