Marko pointed me to a dd-wrt forum article that suggested that the ECB-3500 needed a 60 second reset. That doesn’t work.Even tried a 60/60/60 that also didn’t work.
The start command refers to the Hotspotsystem installation process created in Manage > Locations > Hotspot Information > ROUTER SETUP COMMAND FOR THIS LOCATION
I did notice while doing a ping -t during the reset attempts, I got about a 2 second response from 192.168.1.1 during power on.
I was able to get to the RedBoot prompt and was able to re-install the linux.bin image from dd-wrt. This was done according to the manufactures instructions that came with the router, the same ones I used to install dd-wrt the first time.
To my suprise, it had no effect. Somehow, I think I need to erase nvram or something first when I get the RedBoot prompt. Any ideas?