Q: Moved my 2010 iMac to another outlet - Will not power up now.
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May 3, 2015 7:23 PMby den.thed,Check to make sure that the power cord is firmly plugged into the back of the iMac.
If that does not help, see > https://support.apple.com/en-us/HT204267
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May 3, 2015 8:45 PMby paul oberman,I can help with this.
This is a common error with imacs, when they are unplugged or suffer power interrupt while running.
There is a safety feature, which kicks into play, when the machine senses a power irregularity. It locks you out of restarting the computer
This happened to my machine serveral times.
To fix, do this:
Unplug the cable from the back of the computer. Let the machine sit off for at least 24 hours. Plug in and restart.
I wish the fix was faster, but sometimes the machine has to sit for a couple of days.
I have seen no instructions from apple, which address this situation. I found this after digging around the forums for quite a while and believe me when I say that this is the only way that I have been able to restart the machine.
Good luck and don't take your machine in, as they cant do anything either.
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May 4, 2015 7:44 PMby paul oberman,HelpfulYes. Try that first. Hopefully it will work. If not try the long method.
To be clear. You do have to pull the cord from the back of the machine. Who knows why.
Dont be discouraged if the short method doesn't work. It didn't for me. The long method did, but it certainly is worth a try.
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May 4, 2015 7:49 PMby GlenAnderson,OK, this is interesting. I tried all the suggested plugging & unplugging....Nothing. I took a power cord from a PC and plugged it in. She powered up! I shut down normally and now it will again not power up with either cord. The fact the it did power, I take as a good sign. I go to the store and purchase a new cord tomorrow I guess. I'll post results. Thanks to all assisting.
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May 5, 2015 5:23 PMby paul oberman,HelpfulThats strange. When youre turning the machine off, are you completely letting the machine power down. Sometimes these machines will take a long time to turn off.
Also, if you leave it off, it really needs to sit at least a day minimum. I know it sounds like bull, but rushing it sometimes means you have to start waiting again.
Not sure what to make out of swapping the cord.
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May 5, 2015 5:33 PMby GlenAnderson,Day 3. I purchased a new (generic) power cord today. Of course I had to give the IMac cord another shot at it. She powered right up. I did a restart, rather than shut down. And another restart. Now, feeling bold, I puffed out my chest, took a deep breath and powered down. With a light tap of the power button, she responded swiftly, like an angel rising from the ashes. She's BACK!
What to make of this all? Well perhaps, just maybe, if I simply left it alone for a few days as I've read, she would have powered up when she was good and ready.
OR - I had just the right touch. The pure genius mixed with desperation to know just how many times to screw with the cords at the precise time intervals to revive the old gal. Just happy to see her again.
Thanks again to anyone thoughtful enough to assist. One would think Apple would be on top of this providing it is an ongoing problem.
Cheers.
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May 5, 2015 5:52 PMby dwb,As CSound1 says, maybe it was wierdness - perhaps the fourth wasn’t with you. But the basic behavior is known and is intentional. It protects the computer from potential damage from flickering power. Your problem was more extreme and makes me wonder if there might be a power issue where you are plugged in now or if there’s a problem with the computer.
Note: some years ago I had a client whose new home computer was powering on without human intervention and sometimes powering off too. Since he was a good client I took a look and saw nothing. We were discussing next options over a brewski when I watched the darn thing power up. I also noticed that the air conditioner and also just kicked on. Long story short, he wound up having an electrician come out and put the window air conditioner on its own circuit. Could be something similar with your place.
