WAC720 bricked/continuous firmware update loop following firmware upgrade?

So far I have:

1) Removed the AP from the Controller via the AP Management in the Controller.

2) Performed a hard reset to the AP (holding button down for 10/15seconds)

3) assured that it was not cable related by patching direlctly to a POE Switch with known good patch,

4) restarted the AP - The loop Continues, Once they start this process we can still login via http, but the AP restarts itself periodically.

I have tried converting the AP to standalone mode multiple times by setting up a TFTP with the standalone firmware file (WAC720_WAC730_V3.8.3.0.tar), the AP takes the file, says it is installing but when I login to the AP over the web it is still showing the old managed "thin" firmare 5.5.1.4.

I have tried re-adding the AP to the controller but it ends up in the same reboot loop once it is discovered and managed again.

The state of the AP LED's:

power - flashing amber

activity - flashing green

network/lan: solid green

Thoughts, has anyone found a work arround for this AP? It is under prosafe warranty but hoping I can fix it without RMA'ing.

Thanks :)