My 2007 MacBook Pro might be dead. It is hard locking spontaneously, and requires a soft-reset to reboot. I think the fans aren't working and it's overheating, but I've not really diagnosed it yet.What are some tools to diagnose a possible thermal-management system failure? I've replaced one fan three years ago, when it stopped working. That's not too or too expensive. Buying a new Mac is not what I wanted this year. What used to be a new computer every several years is now become two computers, two iPads, and two iPhones in that period. And this is the iPhone year. I was thinking the mini was now a good fit for my needs. I not much with my computer. The most taxing use the past two years has been the Flash ads on HTF (I wish I were exaggerating). I do a little iMovie, learning to program in Ruby, and light email. Maybe on a new Mac, I'll finally play Starcraft 2.The entry mini at $599 could work. It looks SSD is still over $1000, which is more than I want to spend.iMac, too expensive. And I've got an old 20" Cinema Display that works fine for my needs. A look at CraigsList was disappointing. Haven't tried eBay. Apples refurb store is selling 2011 minis with Core 2 Duo. If I'm going to buy new, I think I want at least an i3 vintage, since that's a good deal faster, and with much better igpu than the C2D?Thoughts? Is there a way to get an i3 or better Mac with an SSD for under $700?