I havent used my iMac for about a year and now it will not boot up. I have tried most of the "hold that button down for 10 seconds" tricks but to no joy. What next? How would I test the power supply?
Try repeating steps 1-3 of what BDAqua suggested. Then plug the power cable back into your iMac. Make sure that your keyboard & mouse are the only peripherals connected to your iMac. Then press the power button ONCE & let go. Wait a second or two. Then press the power button a second time & let go. See if that does the trick.
I have had a few iMacs that required 2 presses of the power button before they would start up. Even the one I'm using right now requires that every time I start up.
Try repeating steps 1-3 of what BDAqua suggested. Then plug the power cable back into your iMac. Make sure that your keyboard & mouse are the only peripherals connected to your iMac. Then press the power button ONCE & let go. Wait a second or two. Then press the power button a second time & let go. See if that does the trick.
I have had a few iMacs that required 2 presses of the power button before they would start up. Even the one I'm using right now requires that every time I start up.
Is this what you tried?
1.. Shut the machine down.
2.. UNPLUG the power lead to the computer and any peripheral devices.
3.. leave it for 10 minutes.
4.. Hold power Button in for 10 seconds
5.. Connect everything back up and restart.
Yes, that's what I did.
I havent used my iMac for about a year and now it will not boot up. I have tried most of the "hold that button down for 10 seconds" tricks but to no joy.
