My tech has been working great up until today. I've been switching from laptop to doc cam (Elmo) with ease. But today,I couldn't get the projector to display my computer screen for ppts, when I switched it from doc cam to computer mode. I finally closed the top of the laptop down and ppt came up on the screen. Is there a way for me to adjust the setting so ppt shows what's on my laptop with the lid open? Hope I'm making sense.