 @KMyers  does that USB KVM device for Android require an app or drivers?
 I have an Android based device without any input or output method.  Just a USB port.  Would that work?
 It needs an app. You should be able to install it via ADB and trigger it's intent over ADB as well as long as ADB us running and authorized
 @AdamOutler - It may be possible to also use a keyboard to enter keystrokes to activate the app or enable USB debugging. Would be complicated if you cannot see the screen
 Mm seems I got 2 bad Anker cables