ALL peripherals do not work. No usb,displayport,ethernet

I've tried to find a similar thread but each one seems to be item specific and not all. My problem seems to be all peripherals (anything that plugs in the back) do not appear to be functioning. The unit turns on and off, that's it.
I have a 3,1 mac mini, the last revision before the unibody. The primary use of this unit is as a headless computer serving Apple TV content to the ATV2. The ATV2 primarily used for Netflix as well as local content from the Mac Mini.
I've had no problems at all in the past, so this is somewhat surprising for me. Plus, having it headless it's not immediately apparent that there may be issues. Here are the things that were tried as the problem was discovered. I'm hoping maybe there is some fix that I may be overlooking.
Power light is on.
Turns on and off.
Cooling Fan is on.
Rebooting has no effect.
Can't screen share anymore.
Checked to see if peripherals may have been turned off/unplugged.
The unit connects to the internet via Ethernet connected to an 8 port switch, which connects to an AEBS.
The switch has power.
The ethernet ports (both on switch and mini) are NOT on. This is when I figured I had a bigger problem.
I tested different ports and no change.
Tested ports with other functioning lines on the switch and they light up fine.
Connected a different ethernet cable that is known to work to the mini and there are NO lights. As far as I can tell, the ETHERNET PORT is not functional.
At this time I tried using a boot disk. It takes the disc and spins but nothing changes. I had no displays that could connect via mini displayport or mini DVI to verify.
TODAY, I purchased a mini displayport to VGA connector so that it can display out to the TV -- NO DISPLAY. Verified that the cable is functional on a macbook pro.
I don't have a apple mouse, so I tried connecting a USB trackball. No light emitted from trackball.
I connected a apple keyboard, and no light coming from the caps loc button when pressed.
I've tried PRAM reset.
I've tried SMC reset.
I've tried PMU reset -- this one forces the fan to high for a long time (or until I turn it off).
This is a second mac mini used this way and had no problems up until now. I have upgraded RAM to 4gb myself, and has been running just fine for the last 45 days or so. Not the first mac mini I had to open up so I doubt that was the issue, but I suppose bad RAM is always a possibility. I doubt that bad ram could make everything inoperable though.
The mini is out of warranty so if there is no fix, there's a good chance it'll need to be replaced.

Problem resolved.
Because the hardware failure seemed to be fairly massive, I decided to go ahead and open it back up to see if there was a loose ribbon cable somewhere.
Sure enough, there was. The back left corner connects some circuit boards from that are part of the upper assembly that houses both drives and fan.
I reattached and crossed my fingers.
I was happy to get an audible error message, LOL.
3 beeps/flashes says RAM failure, which just seems unbelievable to me. I twice reseated and restarted and still got the error. I feel fortunate that I kept my old RAM just in case and tried it instead, and now it WORKS!
YAY.
Now to see if my upgrade is still under warranty.
Thanks for hearing my rant.

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13/3/15 12:57:15.111 pm com.apple.xpc.launchd[1]: (com.apple.systemprofiler[2417]) Service exited with abnormal code: 1
13/3/15 12:57:15.111 pm com.apple.xpc.launchd[1]: (com.apple.systemprofiler) Service only ran for 0 seconds. Pushing respawn out by 1 seconds.
13/3/15 12:57:16.183 pm System Information[2418]: Unable to load nib file: SPApp, exiting
13/3/15 12:57:16.187 pm com.apple.xpc.launchd[1]: (com.apple.systemprofiler[2418]) Service exited with abnormal code: 1
13/3/15 12:57:16.187 pm com.apple.xpc.launchd[1]: (com.apple.systemprofiler) Service only ran for 0 seconds. Pushing respawn out by 1 seconds.
13/3/15 12:57:17.248 pm System Information[2419]: Unable to load nib file: SPApp, exiting
13/3/15 12:57:17.251 pm com.apple.xpc.launchd[1]: (com.apple.systemprofiler[2419]) Service exited with abnormal code: 1
13/3/15 12:57:17.251 pm com.apple.xpc.launchd[1]: (com.apple.systemprofiler) Service only ran for 0 seconds. Pushing respawn out by 1 seconds.
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13/3/15 12:57:18.316 pm com.apple.xpc.launchd[1]: (com.apple.systemprofiler[2420]) Service exited with abnormal code: 1
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Step 1
The first step in dealing with a startup failure is to secure the data. If you want to preserve the contents of the startup drive, and you don't already have at least one current backup, you must try to back up now, before you do anything else. It may or may not be possible. If you don't care about the data that has changed since the last backup, you can skip this step.
There are several ways to back up a Mac that is unable to start. You need an external hard drive to hold the backup data.
a. Start up from the Recovery partition, or from a local Time Machine backup volume (option key at startup.) When the OS X Utilities screen appears, launch Disk Utility and follow the instructions in this support article, under “Instructions for backing up to an external hard disk via Disk Utility.” The article refers to starting up from a DVD, but the procedure in Recovery mode is the same. You don't need a DVD if you're running OS X 10.7 or later.
b. If Step 1a fails because of disk errors, and no other Mac is available, then you may be able to salvage some of your files by copying them in the Finder. If you already have an external drive with OS X installed, start up from it. Otherwise, if you have Internet access, follow the instructions on this page to prepare the external drive and install OS X on it. You'll use the Recovery installer, rather than downloading it from the App Store.
c. If you have access to a working Mac, and both it and the non-working Mac have FireWire or Thunderbolt ports, start the non-working Mac in target disk mode. Use the working Mac to copy the data to another drive. This technique won't work with USB, Ethernet, Wi-Fi, or Bluetooth.
d. If the internal drive of the non-working Mac is user-replaceable, remove it and mount it in an external enclosure or drive dock. Use another Mac to copy the data.
Step 2
You might be able to start up in safe mode even though you can't start up normally. Otherwise, start up from an external drive, or else use the technique in Step 1b, 1c, or 1d to mount the internal drive and delete some files. According to Apple documentation, you need at least 9 GB of available space on the startup volume (as shown in the Finder Info window) for normal operation.

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ALL peripherals do not work. No usb,displayport,ethernet

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