Lit AV switches on Emerald sabers are often linked to channel 4 on the driver. To keep it on, you need to turn that channel on all the way.
The verify, though, find which slider is turned up on the flash option, as it is obviously linked to that.
Turning up channel 4 and leaving it up should power the AV switch.
Thank you for the info! I'll be sure to look into that as soon as I can!