I have a 3 year old Mac Pro, with an original HD and in SSD that I installed myself about 1 year ago. All software updates and Mt Lion are installed. It has worked flawlessly.
Recently the computer is crashing unceremoniously -- either it fails to wake up from sleep or it just stops working (sometimes with a weird sound). This happens 1-2 per week of hard use. Definitely unusual.
How do I troubleshoot this? I seem to be unable to locate an apple hardware diagnosis that works. I installed Mt Lion from the app store, and my older DVD as well as a new memory stick from a Mac Air refuse to run (because it's "incompatible with this configuration")
Here is my system log from last night, and the failure to awaken this morning after the crash. http://pastebin.com/N0Zw7FTZ
Any insights would be awesome!