Bitfiddler
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I have a windows 10 64 bit machine with all available updates. I have an evga nvidia 1080 gtx card with latest nvidia drivers. I have an asrock z170 itx mb with latest bios (7.1). I have PCI selected as my primary graphics card. I have disabled the onboard graphics in the BIOs.
When the hdmi port from my vid card is connected to my monitor, there is signal during the BIOS boot process, then I see the windows icon and about 2 seconds of the loading spinny wheel, then the screen goes black and no signal.
If I boot into the BIOS, the hdmi output works fine so it's not a monitor, mb or graphics card issue. I have tested the cable and monitor using my wife's laptop and they work fine over hdmi. Monitor has a native 1920x1080 resolution. It's something in Windows 10 that decides it doesn't like HDMI at some point during the boot process. I have tried uninstalling and re-installing drivers. No luck. I have tried resetting the bios using the button on my motherboard. No luck.
Everything I have read about this problem in online forums I have already tried without progress. Does anyone have any other ideas as to what I can try?
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Sajin
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Re: Windows 10 HDMI no signal
2016/11/17 21:07:37
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Inside the motherboard bios make sure the pci-e lane is set on Gen3 mode and not Auto.
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xrav22
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Re: Windows 10 HDMI no signal
2016/11/17 21:07:45
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The only time that happens to me is when I have a second monitor hooked up and windows is actually on the monitor that is turned off.
I would try a dvi cable , just to install the latest drivers there have been many bugs lately
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Bitfiddler
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Re: Windows 10 HDMI no signal
2016/11/17 21:16:19
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xrav22. I have only one monitor. DVI does work however I need hdmi to work since I have an HDMI kvm that my wife and I use to share a monitor/keyboard.
Sajin, I will try your suggestion shortly. Thanks.
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Bitfiddler
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Re: Windows 10 HDMI no signal
2016/11/17 21:29:01
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Tried setting to Gen 3. No luck :-(
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Sajin
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Re: Windows 10 HDMI no signal
2016/11/17 21:43:45
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You are connecting directly to the pc right now without going through the kvm?
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3etatester
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Re: Windows 10 HDMI no signal
2016/11/17 22:03:07
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Might just be the way the devices are communicating via the switch. If you go direct, it works?
May even try wiping your Nvidia drivers and reinstall.
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Sajin
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Re: Windows 10 HDMI no signal
2016/11/17 22:17:21
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3etatester
May even try wiping your Nvidia drivers and reinstall.
+1 Use ddu to remove your nvidia drivers then perform a clean install. Details on how to do this can be found here under step #2. If doing step #2 doesn't help then your gpu may have a faulty output.
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Re: Windows 10 HDMI no signal
2016/11/18 07:36:38
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I know you said you tested the cable on your wife's computer, but do you by chance have a different HDMI cable to try on your system. Just a thought. I've seen certain cables cause issues sometimes.
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Bitfiddler
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Re: Windows 10 HDMI no signal
2016/11/19 09:39:20
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Ok, looks like it's something going on with the KVM and windows 10. I tried all the components separately with my wifes laptop then connected by PC to the KVM and it didn't work so I thought it was related to windows (the KVM is brand new). I'm going to some digging to see if there is an issue with this KVM and win.10
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Luta Wicasa
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Re: Windows 10 HDMI no signal
2016/11/19 09:42:24
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Bitfiddler
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Re: Windows 10 HDMI no signal
2016/11/19 09:56:28
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Very strange. When I swapped the channels on the KVM (so my PC was on channel 2 and laptop channel 1, I reversed the two) now it seems to work. So there must be something different between the two channels that Windows 10 doesn't like.
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Re: Windows 10 HDMI no signal
2016/11/19 10:07:46
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Oh I didn't see you were using a KVM switch box until now. I would have suspected that as the likely culprit first thing. Anyway, glad you got sorted out. 
i7 6700K, Corsair H80iGT, 16GB Corsair Vengeance DDR4 @3000MHz, EVGA GTX1080 FTW, MSI Z170A Gaming M7, Samsung 950 Pro 512GB, Samsung 840 EVO 250GB, WD 1TB, Creative SB Zx, Dell P2715Q 4K/UHD @60Hz, Samsung B2230HD 1080p @60Hz, Windows 10 Pro, Corsair Air 540, Seasonic 860watt XP2, Corsair K70 RGB, Razer Deathadder Chroma
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