Part IV: Short Talks

Question 71 - 73 refer to following paragraph:

Attention, conference attendees. Thank you for your patience while you wait for us to solve this delay. (71) Unfortunately, the computer that is to be used during the keynote speaker's presentation is having problems. As a result, we are currently transferring the necessary files onto a different computer. (72) We plan to get underway with the presentation in half an hour. In the meantime, feel free to enjoy some of the refreshments provided near the entrance. (73) We will dim the lights in order to indicate that the presentation will be beginning. Please return to your seats at that time.

71. What is causing a delay?