I am having an issue with my TZ at startup. Each time I turn it on now I get the message Bookkeeping Total Cleared and Factory Settings Restored. Ordinarily this would indicate that my batteries are low and not saving previous settings when machine is turned off. The batteries I removed were good but I put in new one anyway. Still same result at each startup. Annoying. When I removed the batteries, I noticed that the middle holder has a very small ring missing at the bottom of the bracket where the bottom of the battery would rest when installed. Could this battery not be making good contact and thus not functioning to hold stored settings? I have considered putting a very small copper washer between the bottom of the battery and the top of the contact to replace the missing spacer. It appears that the top and bottom of each battery holder has a small "cushion" with a copper top that touches the tops and bottoms of each battery when inserted into the holder. Would I do any damage if I used a small copper washer at the bottom of the battery holder where the "cushion" is missing. My thinking is that I am not getting a good contact in my battery pack so as to retain memory when machine is turned off.
OR is there some other way to correct this situation. I have cleaned all the contacts. Incidentally, the machine has not had much use for years and when it was being used regularly, I did not have this issue very often. I would reset clock, etc and be good for weeks.