Problem Fixed - at least for now
Thanks to both of these suggestions.
I found the tech bullentin behind the control panel. Useful information, but similar to that found on this website.
I read the code. It was a code 9 (9 flashes) indicating that the motor brake failed. The fix for this is to replace the motor. At a cost of more than $200, it didn't seem reasonable to do. Then I noticed the comment about resetting the code. I tried this and it worked. The washer now works, at least for now. Hopefully, it will keep on working.
Thanks for your help.