Chosen Solution
after shutdown iMac… it won’t startup anymore.. but leave alone after 30minutes or 45 minutes(sometimes 2hours) it show startup!! I just bought for 6months why doesn’t it boot? does power supply failed? please kinda help.. I’m Newbie of Mac thankyou..
Some component is overheating. It should still be under warranty, contact Apple for a free repair. Here’s where to get them: http://support.apple.com/kb/HE57
