Packet trace shows that connection is reset (RST).
"Show advanced /TCP/Connections" command from the CLI shows that SSH, HTTPS console and HTTP console are not listening. All are enabled. If you try to disable and then re-enable then you get the following output:
% Could not create SSL context : SSL initialization failed.
% Error initializing secure connections
A replacement ProxySG was sent to the proxy administrator
The hard drives from the old ProxySG were removed and inserted into the new ProxySG so the configuration could be saved.