Question screen flickering and pc making disconnect sound.

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Dec 8, 2019
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hello everyone. my computer is a desktop I built myself running windows 10. all was well until a couple nights ago it started a problem where it will randomly say something has been connected, followed by my screen freezing for half a second. I have ruled out my monitor or hdmi as I swapped these out and it has persisted. i have noticed that device manager is showing two monitors (i only have one) and I'm wondering if that mysterious second display is the cause. I'm putting this under windows 10 because I have no idea what the cause is. heres some information relevant to the situation.
I have a TCL tv as my display which is hooked into my RX 580 HDMI port directly. I am running this rig with an I3 8100, and an ASrock H310M-HDV motherboard. bios is up to date.


edit; after some testing, ive found my issue. that second monitor is labeled "generic non-pnp monitor. i uninstalled this from device manager and all seems to work well as long as i dont accidentally change dual screen mode.
 
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