Both screens go blank when I plug another monitor in

This is the situation. I recently got a spare HDMI adapter, and with another cable and a spare monitor lying around, I figured, "Why the hell not?" So, I plug in the adapter that's connected to my first monitor with no issues. However, when I plug in number two, both screens show the prompt saying that there's no signal. So, I get the idea to try it after restarting, and it worked. At first. When I plugged both cables into the adapter and flipped the switch, the startup loading screen for the computer showed up on both monitors, which is great. But that's where it stops. After the loading screen, both monitors go black, and not even the "No Signal" kind like earlier. I'm just wondering what the hell kind of prejudice my computer has against a second monitor. Any advice on this matter would be wonderful, so I thank anybody who gives advice.

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Since so little is known about your PC.

I can't begin to guess. We do know that some of the video drivers Microsoft picks for us are just broken like that.

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Thanks for your reply. It sucks that my monitor's not going to use, but at least I know what's going on.

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Be sure to share what's going on.

I only noted a common issue I run into but can't say that's it since what this PC is, is not shared yet.

I'll share the method/procedure I use when I suspect Microsoft's driver choices.

1. Disable Windows Driver updates (how is on the web.)
2. Your choice to:
a. Install the driver you think is best.
b. Go get DDU (what is and how to use is on the web) to dust off old drivers and install the one you feel is best.

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