Thank you both for your suggestions.
On a different es350, I checked process to print configuration page
User Functions >> Admin (+password) >> List /Report >> List >> NIC config,
from there report prints
I went to print out configuration page:
User Functions >> Admin (+password) >> List /Report >> List >> NIC config, got the usual message "List print is reserved" and nothing happened. Tried again, nothing happened.
[Note: in Service Handbook, v12 Nov 2003, page 5-131 it says to follow the sequence noted in first paragraph with
• Press the [FUNCTION] button. The list is outputted.
I did not press the [FUNCTION] button, the failure to print could be a machine problem or could also be an operational difference due to software revision.]
Put a page on the glass and did a normal copy, copier part is working.
Powered off, powered on, got 5 long beeps (probably not a good sign, have not found reference to beep codes in manuals yet). Message "Network Initializing" seemed to stay on for a long time. Attempted to print NIC configuration again, same results as before.
Did another power cycle, got 5 beeps, still could not print NIC configuration.
They asked if I tried power off/power on, I said yes, they powered off/powered on, machine came up without 5 beeps (figures

). Message "Network Intializing" seemed to stay on for a long time.
[Note: Operators Manual for Basic Function identifies power off process, this process had not been followed.]
Based on this we are obtaining system restore cdrom and will restart the machine clean.