Q: All USB Ports will not work on a Macpro 3.1

Hi

on my macpro 3.1 (OSX 10.7 - latest version) all USB connectors stopped working.

Connected devices:

- usb belkin bluetooth

- Nikon D5100 (off and on)

I already did the following:

Mac desktops (Mac Pro, iMac, Mac mini):

1. Shut down your Mac.
2. Unplug your Mac's power cord.
3. Press and hold the Mac's power button for 15 seconds.
4. Release the power button.
5. Reconnect your Mac's power cord.
6. Wait five seconds.
7. Start your Mac by pressing the power button.

Source: http://macs.about.com/od/usingyourmac/qt/Resetting-The-Smc-System-Management-Con troller-On-Your-Mac.htm

This did not help

I then went on to implement the following (from the same sourdce mentionend above):

If you have a Mac Pro that isn't responding to the normal SMC reset as described above, you can force a manual SMC reset by using the SMC reset button located on the Mac Pro's motherboard.

1. Shut down your Mac.
2. Unplug the Mac's power cord.
3. Open the Mac Pro's side access panel.
4. Just below the Drive 4 sled and adjacent to the top PCI-e slot is a small button labeled SMC. Press and hold this button for 10 seconds.
5. Close the Mac Pro's side door.
6. Reconnect your Mac's power cord.
7. Wait five seconds.
8. Start your Mac by pressing the power button.

This did not work either.

Is there any other suggestion of something I could do?

The keyboard is not working due to the usb malfunction. As a result I cannot log in or change anything with the keyboard.