The teleprompter was skewed downward, not in use. It was there for other speakers. Trump did not use it.
Here’s what I saw. KaSick read his speech from paper at a podium. I didn’t notice the prompters but I wasn’t looking for them either. I’d guess they were up and running for little boy Ryan. IF Trump used them, he did it in such a manner that if no one mentioned it, I’d doubt they’d of guessed it.