Gary - A well educated guess but this time no prize! You should be able to see the "working time" without any input.
I have proved this on 5 Selecos within the last 4 days.
The input usually gives stability to the cross hatch pattern.
Attached is a pic of the 400HT menu , at the bottom should be "working hours", (its 1am and I am not going to get another one out of its box! but all the others show "working time")
Now one currently for sale elsewhere (not mine) has the hours listed.
I am sure it should show up, not sure why it does not.
I spoke to Chris about this and am looking into it.
(we have one idea!)
tech838 - what prompted you to ask this?