Bernie, if you are at lower case letters, scroll back to "a" and keep going until you get into the capital letters - the character options are something along the lines of "numbers, symbols, capital letters, lowercase letters," and I suspect that you scrolled down from X to Z and then on into the lower case set. Also, the key strokes for resetting and for checking firmware are very similar. "SELECT" and "MENU" resets the unit, while "SELECT" and "INPUT" displays version number.