Got my first mac ever, a new iMac about a week ago. A few days ago I noticed that one of the three USB ports on the back of the machine is not working at all. I have called the store I got it from and they said bring it in and they will have a look. He said likely outcome is they will diagnose it DOA and order a replacement. The problem is that it is a custom build, so I am looking at another 10 days or so from the time they order it to get a replacement. Also factoring in all the setting up, reinstalling and stuff that I will have to go through again, that option is not very attractive. Is there anything I can do on my own to see if it is a hardware problem or to try and diagnose it / fix it? If it was a PC the first thing I would do is go to device manager and see if the hardware is reporting anything wrong, however in OSX I can't find any option to manage devices in system preferences other than keyboard/mouse, hard disks and bluetooth. Any help would be greatly appreciated.