Dout troubles

Testing/Troubleshooting
1

Just connected up a Dout module.  When I turn on my MB i get all LED’s lit.  I know this is not correct.  What could be causing this problem??

2

  • short circuits

  • swapped control lines

  • unconnected control lines

  • swapped LED polarity

  • application switches on all LEDs

  • or all the other errors which have been made by people in the past (just use the search function of this forum)

Best Regards, Thorsten.