iMac Won't Boot After Power Failure
I have a 2009 27" i5 iMac.
For few months now, there was a significant delay after I press the power button to machine to power up.
Few weeks ago, I had a power outage and aftwards it woud not turn on. Things I tried:
- Restting SMC
- Leaving it unplugged from the wall
- Leaving it unplugged from back of the machine
- Holding down the Power button while plugged in
- Holding down the Power button while unpugged
- Leaving it unplugged with RAM out
About an hour after, it mysteriously powerd up.
Yesterday, I had another power outage. This time I tried the same things, but did not power up for about 6 hours.
Today, I had to unplug it after shutting down to switch power outlets and not it won't boot again. So I have to wait for it to mysteriously do it's own thing.
What can cause this? Could it be a bad PRAM battery? Everytime when it powers up, it works without any issues.