Quote:
There is no voltage between the 25 and 19 pins on the Tx board.


I should have been more specific, what I meant was each of these alone should have 3.3 volts relative to ground. Check between the DB-25 connector holes 19 and 25 individually and a grounded mounting hole and look for 3.3 volts. If you measure between 19 and 25 you would normally get a 0 volt reading. (3.3 -3.3=0). So just to clarify, is this how you measured, or did you measure these pins relative to ground?

Thanks,
Stu
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