How would you handle

[Steve M]

Don,
I would not have turned on that, so I would not have seen whether the ball was fair or foul. I would have been moving to get inside the infield. That's what you should have been doing also. That's not your call, so do not make the call. If, and this is a big IF, your partner needs your help, wait or him to ask, then give him the information that he asked for, and let him make the call. I think you'll find that the well-trained ump will know his responsibilities and priorities on the field AND will take care of his responsibilities, in a prioritized order, and only then will be available to give help when asked.

To answer you question "Should I have corrected the call or let it stand", the call was correct (based on what the PU saw) and you were not asked for additional information. Let it stand.