Windows 10 HDMI no signal
Printed From: ASRock.com
Category: Technical Support
Forum Name: Intel Motherboards
Forum Description: Question about ASRock Intel Motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=3827
Printed Date: 21 Jul 2025 at 3:59pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: Windows 10 HDMI no signal
Posted By: Bitfiddler
Subject: Windows 10 HDMI no signal
Date Posted: 18 Nov 2016 at 12:57pm
|
" rel="nofollow - 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 the back. 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?
|
Replies:
Posted By: wardog
Date Posted: 18 Nov 2016 at 1:12pm
Go back to the earleir than 7.xx BIOS. Graphic issues have been a bugger boo with a BIOS 7.xx that is for Kaby Lake, not Skylake. Hence the jump to revision 7.xx BIOSes. |
Bitfiddler wrote:Posted By: wardog
Date Posted: 18 Nov 2016 at 1:15pm
|
Post back your results please. And, when downflashing, use Instant Flash, and remember to reset to defaults, save and reboot afterwards |
Posted By: Bitfiddler
Date Posted: 18 Nov 2016 at 1:18pm
| Will do! Thanks for the info about the 7.1 bios. Will post results as soon as I try it. |
Posted By: Bitfiddler
Date Posted: 18 Nov 2016 at 1:29pm
|
" rel="nofollow - Reverted to BIOS 2.3, it did not work. Should I try a CMOS reset? I also tried setting the PCI-E to gen 3 instead of auto (suggested on a different forum). No luck.
Edit: Tried a CMOS reset with old BIOS. Nope
|
Posted By: LutaWicasa
Date Posted: 20 Nov 2016 at 1:47am
You've kinda left out an integral part of the equation here....using an HDMI KVM.  ------------- I7 6700K Z170 Extreme6 2x8 GSkill Rip Jaw 3200 Samsung 512 950Pro NVME EVGA 1070 FTW |
Posted By: Bitfiddler
Date Posted: 20 Nov 2016 at 1:59am
|
So it turns out this was all an issue from my KVM. I tested all components using my wifes latop, then I plugged her laptop and my PC into an HDMI kvm (brand new) and was getting this issue. 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.
|
Posted By: wardog
Date Posted: 20 Nov 2016 at 2:27am
How the heck did you know THAT important yet missing fact Luta? Google his question? But yea. I used a KVM switch here and I took me three switches to find one that works right. That fact, KVM, should have been included in the OPs 1st post. It is omissions such as that that make it hard to near impossible to diagnose Users issues over the internet  |
Posted By: LutaWicasa
Date Posted: 20 Nov 2016 at 2:36am
I'd seen his post on another forum. After numerous suggestions from other users he just happened to mention the KVM  Yep....without having full info it's near impossible to render any meaningful assistance ------------- I7 6700K Z170 Extreme6 2x8 GSkill Rip Jaw 3200 Samsung 512 950Pro NVME EVGA 1070 FTW |
Posted By: wardog
Date Posted: 20 Nov 2016 at 3:37am
I gave you a Thanks for you mentioning that fact here. Attaboy!  |
Posted By: parsec
Date Posted: 20 Nov 2016 at 1:28pm
I agree about the lack of information... big time!  But can we say that the KVM switch perhaps does not like the Nvidia driver, that is not active while using the UEFI/BIOS UI? Otherwise, what would the difference be between the video card working in the UEFI, but not in Windows 10. Assuming an Nvidia graphics driver is installed. If not, then the generic Windows 10 driver. The latest WHQL Nvidia driver was removed due to many issues in games, so who knows what else it won't work with? ------------- http://valid.x86.fr/48rujh" rel="nofollow"> 
|
Posted By: LutaWicasa
Date Posted: 20 Nov 2016 at 2:10pm
|
I would think it most likely a Win10 - KVM issue but haven't gotten an answer as to which KVM is in use. So, that makes things somewhat impossible to research. ------------- I7 6700K Z170 Extreme6 2x8 GSkill Rip Jaw 3200 Samsung 512 950Pro NVME EVGA 1070 FTW |