This is my first post and I know nothing about Macs except what I've read from you guys on this forum. I would appreciate any help you wish to offer. It's my daughter's mini that she bought new in 2011. Says she rarely ever used it, but still it went out over a year ago and she just hasn't wanted to spend the $100 minimum she was quoted from Apple in Houston to repair it. Symptoms: On power up the screen lights up. After a 3-4 second delay the logo appears. After another similar delay the spinning circle appears, but goes away after about 35 seconds. The screen stays lit and the unit itself stays powered up (with fan running) until I hold the power in for about 5 seconds. I have never left it running like that for over 3-5 minutes, so I don't know what would happen if I left it on. I tried booting it up in the safe mode and there was a slightly different outcome, described as follows: Similar to above, but a longer delay for the spinning circle to appear (probably 12-15 seconds. But soon after, the progress bar appeared. It moved up to about 30-35% (this took about 40-45 seconds), then it went away. From there it behaved just like above. Some observations and speculation, but bear in mind that I have no experience with Mac whatsoever and therefore may be of little or no value: Why was I able to get the progress bar and significantly less heat generated in the safe mode? I almost forgot to mention that I eliminated the ram as the problem by switching from the original 2 x1g with 2 x 4g that I got from Newegg knowing that an upgrade would be necessary in today's world. I'm pretty sure the HD is good as I checked it with a disk management program on my PC and it showed to be a healthy unit. It would appear to me, again as a complete Mac novice, that it probably has bad logic board. I've tried the "baking" procedure I read about, but it made no difference. Thanks to anyone that had the patience to read this.