Recently I received a HP-67 which shows the following failure: when switched on (in run-mode) the display shows "00000.0". Numeric key entry gives nothing but math functions seem to work. E.g. enterting "h 2" displays pi as "31415.9". All calculations seem to work fine, only the diplay is weird. Values between 0 and 9.999E19 give a wrong display, while values greater than 1E20 are displayed correctly. Pressing one of the definable keys causes the calculator to hang up.
When switching to PRGM the display constantly shows "992 31 25 24". No keystroke changes this display.
Any idea of what is defective? Maybe memory?
Thanks, Achim
HP-67 problem
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