Yes I did all the obvious things - many times.
I guess I'm just going to junk it (unless you have any further suggestions). A new console will cost too much compared to a brand new treadmill.
Thanks for your help.
Yes. It was reading 13 volts (not under load).
I was also thinking that the console is bad. Are there any tips in troubleshooting it? It looks like a full console replacement would cost almost as much as the treadmill itself.