we keep running into a problem with the presentation of our videos. While the experiment starts out fine, after a certain time the screen suddenly turns black at the beginning of the video stimulus, and we can go back to see the stimulus when moving the mouse (we use a Cedrus RB-730 response pad for the participants). However, the same thing happens again for the next 10 trials approximately. It seems only to happen when the experiment has been running for some time, around 10 minutes. What could be causing this problem? Is it a memory or power issue?
Thanks for your help!