Mac troubleshooting: What to do when your computer won't turn on
Posted 18 February 2013 - 05:50 AM
I unplugged it for a few minutes. Then I tried turning it on. Usually ended up waiting a few more minutes and tried again. By the third time, it would boot and be normal for months.
I probably should've tried the SMC reset.
Posted 18 February 2013 - 07:50 AM
My mother-in-law's iMac (2007) is now doing the same. I opened it up and found no problem with the switch. Tried all the Apple fixes (same info as this Macworld posting) including the steps to reset the SMC. No help. Next stop is the Apple Store. If a new logic board or power supply is needed, this nice 24" computer is destined for the junk pile, and my mother-in-law will no longer have a computer - there is no way she can afford a new one of any brand, let alone Apple.
Posted 22 February 2013 - 11:37 AM
The only way I can get it to boot up is to remove the PS (AC power) and then remove the battery for at least a few seconds (several minutes might be necessary. That lets all power from capacitors drain.).
Then restore the battery and PS cable and it has powered up every time.
Fortunately my MacBook has the easily removable battery with the flip-switch and pop-out battery. Why they went away from that made no sense to me.
Posted 25 March 2013 - 02:19 PM
Posted 18 May 2013 - 11:54 AM
I was all set to call Apple Care when I read the SMC routine. Note, I was getting absolutely nothing from the iMac when I pressed the power button. No fan whirr, nothing. It was like it was totally dead. All cables were correctly inserted and going to a proven live socket.
I followed the SMC routine :
Shut down the computer.
Unplug the computer's power cord.
Wait fifteen seconds.
Attach the computer's power cord.
Wait five seconds, then press the power button to turn on the computer.
and hey presto...it works again!
Now I'm a happy Apple user again:)