Hello sir, I think you are refering to the computer`s screen that is turning of right? Well if that is the case you have a few options that are not myDMX 5 related they are related to the Windows/Mac computer. If you use Windows (sorry I don`t know Mac settings, I never owned one, but maybe they are somewhat similar) First set the computer screen turning off time to ''never'' ,then if it has a screen saver deactivate it in settings: in Windows you set it to ''never'' or if it is a picture slide show you set it to ''paused'' .Then go to the sleep and hibernate setting of the computer and turn them off completely so the computer is always on and full potential. And lastly go to usb settings and at the port where the interface is connected set it up to ''power management - allow to turn the device off - no (set it to no) '' .After all these settings are done, the computer will run full potential and it will never enter to sleep, hibernate or usb turning offs. This should be always done with a computer/laptop that runs various software and interfaces for work pourposes.