I have an ASUS ROG Strix XG27VQ monitor, connected to my PC via Display Port. My Logitec z533 speakers are plugged into the monitor with an AUX cable. Until recently, this worked fine, and i was able to see my various audio output options in my sound settings. Now, my monitor is no longer detected, and I can only play audio from my USB headset. In the past this problem would occur occasionally, but it was always fixed by turning my monitor off and on again.. Any help is much appreciated.