I have a 32E which seems to work well. However, when running the self test, it is inconsistent in the final display. Sometimes it shows all zeros, sometimes just a minus, sometimes it shows the full display for a fraction of a second before going back to the previous entry, etc... Often though (about every other time), it shows ERROR 9, and occasionally (rarely) ERROR 0.
After I finally got up the courage to POP it apart, I found that it is solderless. I cleaned all the chip and switch contacts, and reassembled. There has been no change.
Everything elso looks pretty good. Any help will be greatly appreciated.
Thanx.