I have recently finished assembling the Gertboard and am just going through the tests described in the Gertboard user manual.
Testing the pushbuttons. - Worked
Testing the LEDs - Worked
Testing I/O - Failed
When I wire the board up for the Testing I/O I only get 00 displayed. None of the buttons make any difference and 00 just stays there regardless of what I do,
Does any one have any ideas on how to trouble shoot this?