Motorola Xoom :: Failed Image SOS 0x0002?

I have a Wi-Fi Only Xoom (MZ604) and finally received the invitation to update to v3.1 last night. After downloading and proceeding with the update the tablet powered off and restarted. A progress bar for the update was displayed and didn't even get 1/4 through when a Warning Triangle and the Droid Character appeared on screen. After waiting for two hours, this image was still on screen.

I held volume up and the power button and the Xoom rebooted. When it reached the lock screen it would wait a couple seconds and then power off and attempt the upgrade again. The bar graph would update a little and then the Warning Triangle/Droid image appears on screen again. No matter what I could not stop this cycle, let alone power off the unit.

I will admit that I unlocked the Xoom, but I have never attempted to root it. Having said that, I was sure that my upgrade problem was related to unlocking the Xoom and as my laptop with the SDK, ADB and fastboot was at work so I had to wait until this morning to relock.This morning I connected my Xoom and was able to get the NVFlash/RSD/Fastboot menu. I entered Fastboot mode and from my PC issued fastboot oem lock and proceeded to select yes to the warning. The device started the lock process.Here comes my problem: After a couple minutes the device restarted and showed the following error on the logo screen:

Failed image SOS 0x0002
Starting RSD mode 2

I have been fantically looking for a solution to fix this. If I hold down the power and volume up keys the unit will power off briefly but then powers on again (as it did last night) and displays the same SOS error message.If I hold the volume down key (or even the power on and volume down key) when it restarts, I get the following:

Failed image SOS 0x0002 Starting Fastboot protocol support.Which you would think is great, but if I type fastboot devices on my PC, no device is shown and fastboot oem unlock just displays "Waiting for device" on screen without ever communicating with the tablet. I have tried every key combination I could find on the web and have tried rebooting my PC and I cannot get the Xoom to communicate, power off or do anything than display the previously mentioned errors.