I stepped out today and when I came back I found my ancient G5 tower turned off although I had left it running. Curiously this happened a few days ago, but then when I pressed the power button it restarted. This time, no such luck. It's dead. It might be a good time to replace it but I'd like to troubleshoot first. My first culprit would be the power supply. What's the easiest way to verify if my power supply is dead or alive? Also any online hardware troubleshooting links would be appreciated. I'd be willing to pay for a new power supply, and maybe even a new hard drive, but would a completely dead Mac be indicative of a bad HD? I also have a 2011 MBP. If none of these easy things work, my next choice would be to upgrade to either a new iMac or MacPro. I really don't want to pay more than $2400, but I also want a Mac that can handle games relatively well, maybe better than my MBP. I've always liked the upgrade options that come with the MacPro tower so I need to think on it. I see the new iMacs only have i5s while my MBP has an i7, but I remember some good vibes about the $1999 iMac's gaming performance. Do those processor numbers reflect relative speed? Any thoughts on my meandering would be appreciated. Thanks!