Hello MikeW06850,
I see no one has responded to this post yet. So, at this point I would recommend contacting your local Xerox Support Department to speak with a Product Specialist for more assistance. Please call 1-800-821-2797 or 1-800-835-6100.
I'm working on a WC 3655. This is how I found it when I was called to it. I have replaced the ESS Board, SD Card and HDD. I have swapped UI's with a known good unit. It will not take an altboot period. It will boot to the regular green screen and then after a couple minutes will change to the screen in the photo below and just hang there. The POST lights are normal as well. To my knowledge, the environment did not suffer any power surges or voltage spikes.
Any suggestions would be appreciated
Fine print at top says "Please wait. The system is restarting"