Display disconnects after windows starts to load

May 20, 2018
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My display disconnects after booting. I see the windows loading screen and then I hear a USB disconnect.

I have tried different monitors.

I have tried different power supplies.

I have tried different video cards.

I have reformatted and reinstalled windows 9 times. What's interesting is after I reformat windows I get about 20 minutes of functionality then it drops out. The most recent time I reformatted I immediately started a windows update. I thought maybe if I did it would restart on it's own and an update would solve my problem. What's odd is after a half hour I checked it and it was in the installing phase past the download phase... and the display was back.

Of course that required a restart and what happened after I restarted? The signal dropped out after the windows loading screen appeared. I have headphones plugged in and I can actually hear the USB disconnect sound that indicates something is being disconnected.

I am at a total loss for what to do here.

ASRock z77 Extreme4 motherboard. Bios updated today.

Intel i5 3570K (stock speeds)

16GB DDR3 PC1600 Kingston HyperfuryX RAM

Samsung 830 120GB SSD

Basic optical drive

Nothing else is installed or plugged in at this time.
 
May 20, 2018
18
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As far as I know yes. The issue started when the video card was plugged in. I'm now using the hd 4000 display. I can plug in my video card but I don't expect a different result.
 
Was it happening before the motherboard BIOS update?

Which graphics card models, specifically, were you testing with?

When you unplug/plug in a monitor from the graphics card you will also hear the same sound clip as what you would hear when you unplug/plug in a USB device from a USB port.
 
May 20, 2018
18
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I have tested an HIS iceq 7950 turbo and an Asus strix 1080 gtx.

I get no display at all when video cards are plugged in. The last time I plugged in a video card I got an a6 motherboard error which is a no hard drive error.

For the most part the majority of my trouble shooting has been done with no video card installed.
 


Seems like a hardware resource (e.g. IRQs, Port Address overlaps) allocation conflict. After installing the graphics card, did you try clearing the motherboard's CMOS? The Clear CMOS procedure should force a re-detection of hardware changes.