This Netbook has two GPU's and it may be something to do with the fact that Asus decided not to equip this netbook with Nvidia's Optimus technology, which allows notebooks to automatically switch between ***''Intel's integrated graphics''*** and ***''Nvidia's Ion GPU''***. Instead, you're forced to use the included Asus GraphicsSwitch to manually change modes, which requires a reboot.
The Nvidia Ion GPU gives HD video playback on a big-screen monitor or TV via the netbook's HDMI port so this ***''may be''*** what the projector is expecting??? Any how give it a go and tell us if that helps.