Had temp when I first installed now temp is not showing as an option when selecting readouts.

Also, after it hadn't been used in a while (week or better), when I switch on it will just give a white screen. Then have to pull power cable to switch off. After that I may have to start and re-start it a few times to get it to recognize the transducer. Related you think?

No problems whatsoever after it has been on for a little while and I shut it off.