No signal with 5080 hdmi | NVIDIA | Page 1

tight loom Apr 26, 2025, 4:55 PM

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Is anyone experiencing issues with external display connections on the Scar 18 RTX5080(2025)?
I'm facing a problem where the external monitor shows "no signal." Windows Device Manager detects the monitor without any errors, but there is no output to the screen. I’ve tried different ports, cables, and drivers, but nothing permanently fixes it. Sometimes it works briefly after troubleshooting, then loses signal again.

I’m confident that my monitor is not the problem — it works perfectly with other laptops. For reference, it’s an AOC 32-inch 4K 144Hz monitor with G-Sync Compatible support.
I am not sure is this driver problem?

lavish pagodaBOT Apr 27, 2025, 2:04 AM

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Please use a certified and high-bandwidth HDMI or DisplayPort cables to be used with your high refresh rate and high resolution displays. Do not use the cables that come with the monitor or cheap uncertified cables, otherwise you will experience black screens, graphical artifacting, screen corruption, or the display not working at native resolution.

For HDMI, please ensure that your cables have the "Ultra High Speed HDMI" sticker and certification on the retail box as shown here: Ultra High Speed HDMI Cable - Bandwidth Up To 48Gbps
These cables are certified by the HDMI Consortium to support for all HDMI 2.1b features including uncompressed 8K@60 and 4K@120.

For DisplayPort, please ensure that your cables are listed in the database here: Cables & Adaptors Archives - DisplayPort
A certified DisplayPort cable shall have a DP40 or DP80 label for support for high resolution and high refresh rate displays.

tight loom Apr 27, 2025, 4:20 AM

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Hi , I am sure that my cable are certified, which validated by HDMI.org qr code

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Please recommend the cable brand or model that you prefered , I will go for it to try

unkempt wyvern Apr 27, 2025, 4:22 AM

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What is the cable you are using at the moment?

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Also, could you open Nvidia Control Panel, and open the PhysX tab

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and screenshot the window here

tight loom Apr 27, 2025, 4:22 AM

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Atz , which is the local brand from Singapore, but those are certified officially by HDMI.org

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rn_image_picker_lib_temp_4e99bc4f-a33b-459c-8421-4fcd25eb0b27.jpg

unkempt wyvern Apr 27, 2025, 4:26 AM

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Try disabling the iGPU and see what happens

tight loom Apr 27, 2025, 4:26 AM

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I have chance to have signal if I set to duplicate mode with 60hz, but no signal if set to extend mode or second display only mode

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But not always work with duplicate mode

unkempt wyvern Apr 27, 2025, 4:27 AM

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Feels like a driver bug

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Are you using latest drivers?

lavish pagodaBOT Apr 27, 2025, 4:27 AM

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You can download drivers from the official site below. (You will need to specify your GPU and operating system.)

On a laptop, both iGPU and dGPU drivers should be installed for full functionality and performance.

NVIDIA
AMD
Intel

tight loom Apr 27, 2025, 4:27 AM

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I tested from 572 to 576.15 version,

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All the same

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Currently is using 576.15

unkempt wyvern Apr 27, 2025, 4:28 AM

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Do you have another monitor to test

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my concern is that your hdmi port may be broken

tight loom Apr 27, 2025, 4:28 AM

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Don't have, I only have one monitor

unkempt wyvern Apr 27, 2025, 4:29 AM

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try to find another monitor to test

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a cheap one from the office should be fine

tight loom Apr 27, 2025, 4:29 AM

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unkempt wyvern my concern is that your hdmi port may be broken

I don't think so, because ei have 2 laptop but is working fine

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The second laptop is using Intel graphics only

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For work only

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Only having issue with this gaming laptop

unkempt wyvern Apr 27, 2025, 4:31 AM

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tight loom Only having issue with this gaming laptop

Your monitor is fine

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It's the HDMI port on your laptop that needs to be checked

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Pretty sure you have a TV right?

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You can use that too

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Plug your laptop to the TV

tight loom Apr 27, 2025, 4:33 AM

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Hmm

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Let me check my tv ,been a while never use

tight loom Apr 27, 2025, 4:52 AM

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Sorry, unable to test, look like my tv HDMI not working , office laptop and gaming laptop are not working

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I will get a new cable later to try and let u know

tight loom Apr 27, 2025, 5:23 AM

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I have a unidirectional HDMI-to-DisplayPort (DP) cable (laptop to monitor) with a built-in signal converter. When I connect my gaming laptop to my external monitor using this cable, everything works fine — the signal is detected and the display functions normally.

To verify whether the HDMI port on the monitor is working properly, I used the same cable and port (which used by gaming laptop earlier) to connect my office laptop (which only has an Intel iGPU) to the monitor. The display worked perfectly as well. This confirms that the issue only occurs when connecting the gaming laptop via HDMI.

Although the unidirectional HDMI-to-DP cable works with the gaming laptop, it does not support G-Sync, not support HDR and 4K resolution is limited to 60Hz. Based on this behavior, I suspect the issue might be driver-related.
What’s your assessment?

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is look like some handshake problem if connect by HDMI to HDMI direclty by the 5080?

unkempt wyvern Apr 27, 2025, 5:28 AM

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tight loom is look like some handshake problem if connect by HDMI to HDMI direclty by the 5...

might be possible

tight loom Apr 27, 2025, 5:30 AM

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is that possible fix by up coming driver update?

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or is related to chipset problem?

unkempt wyvern Apr 27, 2025, 6:16 AM

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it can be driver issue or faulty HDMI port

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unfortunately unless you have a new monitor to test out we can't rule out the faulty HDMI port issue

tight loom Apr 27, 2025, 6:40 AM

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Hmm . I don't understand why suspect HDMI port faulty , as of testing ,it is only having problem when HDMI direct connect with specific laptop

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It can display with HDMI to dp convertor

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Is look like some info or signal can not passthrough directly via HDMI cable with the port or unable recognize by the driver

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I was using Alienware with 3080 without problem, but the laptop is death

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Thats why change a new laptop with 5080 gpu

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What is your assessment or expectations if I test with another monitor if working or not working?
But working with the HDMI to dp cable with my existing monitor

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Just to highlight that my HDMI to dp cable not require any additional addition adapter or power supply

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It is consumed the power directly from HDMI port

unkempt wyvern Apr 27, 2025, 8:38 AM

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tight loom Hmm . I don't understand why suspect HDMI port faulty , as of testing ,it is onl...

Generally if there is a handshake issue it's either a port or the cables themselves

tight loom Apr 27, 2025, 8:40 AM

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Hmm... I will get a new cable to try

unkempt wyvern Apr 27, 2025, 8:41 AM

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Right now it all boils down to either the laptop HDMI faulty port where it doesn't get a signal unless there is an active adapter/cable or the cable itself is faulty with the power pins not connected/broken

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That is why a 2nd monitor is needed to rule out whether it's a cable or a port issue

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Have you used the certified cable with that iGPU laptop and the monitor?

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does it work?

tight loom Apr 27, 2025, 8:43 AM

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Window OS still able detected external monitor without error if the HDMI port faulty?

unkempt wyvern Apr 27, 2025, 8:44 AM

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tight loom Window OS still able detected external monitor without error if the HDMI port fa...

pretty normal if your cable is damaged or faulty port

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we need to isolate which one is broken

tight loom Apr 27, 2025, 8:45 AM

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Never mind ,I will test, because I don't understand if the cable or port faulty ,why my office laptop is working as normal

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If suspect the port on the laptop is faulty

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I will send to warranty

unkempt wyvern Apr 27, 2025, 8:48 AM

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tight loom I will send to warranty

You haven't answered my question

tight loom Apr 27, 2025, 8:48 AM

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What question?

unkempt wyvern Apr 27, 2025, 8:48 AM

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unkempt wyvern Have you used the certified cable with that iGPU laptop and the monitor?

This one

tight loom Apr 27, 2025, 8:49 AM

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I answered already

unkempt wyvern Apr 27, 2025, 8:49 AM

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The one that you said it was "faulty/not working"

unkempt wyvern Apr 27, 2025, 8:49 AM

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tight loom I answered already

Yes or no?

tight loom Apr 27, 2025, 8:49 AM

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Is ATZ which Singapore local brand and their cable are certified and came with HDMI qr code to verify

unkempt wyvern Apr 27, 2025, 8:50 AM

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tight loom Is ATZ which Singapore local brand and their cable are certified and came with H...

I asked if have you tested that cable with your iGPU laptop and plugged into the monitor

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does it work

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You're not answering my question

tight loom Apr 27, 2025, 8:50 AM

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u mean switch igpu with external monitor?

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I will try later, I am outside now

unkempt wyvern Apr 27, 2025, 8:51 AM

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tight loom u mean switch igpu with external monitor?

The 2nd laptop I mean

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The Intel graphic laptop

tight loom Apr 27, 2025, 8:51 AM

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unkempt wyvern The 2nd laptop I mean

Second laptop don't have dGPU, is only. Intel gpu

unkempt wyvern Apr 27, 2025, 8:52 AM

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tight loom Second laptop don't have dGPU, is only. Intel gpu

Yes I know, but we're testing the cables

tight loom Apr 27, 2025, 8:52 AM

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Iyes

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Is work as I mentioned earlier

unkempt wyvern Apr 27, 2025, 8:52 AM

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I'm just trying to rule out which is the issue, the CABLE OR THE PORT ON YOUR 5080 LAPTOP

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https://tenor.com/view/chris-tucker-do-you-understand-the-words-that-are-coming-out-of-my-mouth-rush-hour-gif-10173001

Tenor

tight loom Apr 27, 2025, 8:52 AM

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I use the same cable and same port used by gaming laptop earlier to connect to office laptop

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I mentioned earlier

unkempt wyvern Apr 27, 2025, 8:53 AM

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tight loom I use the same cable and same port used by gaming laptop earlier to connect to o...

Finally you're making sense

tight loom Apr 27, 2025, 8:53 AM

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tight loom I have a unidirectional HDMI-to-DisplayPort (DP) cable (laptop to monitor) with ...

Here u r

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U can check back my messages earlier , I stated what I did already

unkempt wyvern Apr 27, 2025, 8:54 AM

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tight loom U can check back my messages earlier , I stated what I did already

Wait, so that certified cable was an adapter?

tight loom Apr 27, 2025, 8:54 AM

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tight loom I have a unidirectional HDMI-to-DisplayPort (DP) cable (laptop to monitor) with ...

Not the adapter 😳

unkempt wyvern Apr 27, 2025, 8:55 AM

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Or you have 2 cables you're using, the ATZ cable and that adapter

tight loom Apr 27, 2025, 8:55 AM

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Is HDMI to HDMI cable

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No adapter

unkempt wyvern Apr 27, 2025, 8:55 AM

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tight loom U can check back my messages earlier , I stated what I did already

Yeah you only mentioned the 2nd cable which is the adapter

tight loom Apr 27, 2025, 8:55 AM

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I did not use any adapter

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I mean second cable is not required any additional adapter or power supply

unkempt wyvern Apr 27, 2025, 8:56 AM

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My guess here is that your laptop HDMi might be broken

tight loom Apr 27, 2025, 8:56 AM

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I Abit confused what cable u are referring

unkempt wyvern Apr 27, 2025, 8:56 AM

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tight loom I Abit confused what cable u are referring

Yeah so do I

tight loom Apr 27, 2025, 8:56 AM

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I only use 2 kind of cable to test

unkempt wyvern Apr 27, 2025, 8:57 AM

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Cause you're mentioning one cable and then the other cable and god knows why are you testing if your monitor is working when I told you that your monitor is fine and it might be your laptop

tight loom Apr 27, 2025, 8:57 AM

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One is HDMI cable which is using by gaming laptp,
Another cable is HDMI to dp cable

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HDMI to HDMI is no signal

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But HDMI to dp got signal

unkempt wyvern Apr 27, 2025, 8:58 AM

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ok, stop bothering with the HDMI to DP cable

tight loom Apr 27, 2025, 8:58 AM

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I think u are confusing or do t understand what is my problem

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Maybe I need to simplified my explanation,lol

unkempt wyvern Apr 27, 2025, 9:01 AM

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I think I already mentioned what is your issue

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I'm doing the process of elimination

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To rule out which is broken.

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The MONITOR, THE HDMI PORT ON YOUR 5080 LAPTOP, OR THE CABLE

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And based on the conversation and your own testing it looks like the HDMI port on your 5080 laptop is broken

tight loom Apr 27, 2025, 9:03 AM

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What if I test with other monitor but working with gaming laptop?

unkempt wyvern Apr 27, 2025, 9:03 AM

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tight loom What if I test with other monitor but working with gaming laptop?

Do you have other monitors to test that?

tight loom Apr 27, 2025, 9:03 AM

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I can bring it to my office to test tomorrow

unkempt wyvern Apr 27, 2025, 9:04 AM

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tight loom I can bring it to my office to test tomorrow

I did told you to do that

unkempt wyvern Apr 27, 2025, 9:04 AM

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unkempt wyvern a cheap one from the office should be fine

here

tight loom Apr 27, 2025, 9:04 AM

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I also told I don't have second monitor

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I need to borrow or bring to somewhere to test

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Some more the testing need a little bit time, it is not immediate happen sometime

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And I need to have free time in the office for testing

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I share more what I did u will more confuse, I already skip some other testing in the description

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Like in the beginning is working fine after reformat, but not working at all after few time rebooting

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Because I try troubleshoot it few day already

tight loom Apr 27, 2025, 11:02 AM

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Hi

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Thansk for your support

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I think is my cable problem

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Just change to the other brand which also is certified cable ,seem now is working, I will keep monitoring see whether the problem happen again

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I will try rebooting computer multiple time to test

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And sorry for my bad attitude earlier

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Is just some feature is gray now ,I believe is because of the cable not compatible some of the features, I will get higher grade cable to try again if this cable working fine

tight loom Apr 29, 2025, 1:08 PM

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I have recently tested many certified HDMI cables, but it seems that my black screen issue is related to the Dynamic Refresh Rate (DRR) setting in Windows. When DRR is enabled, the screen goes black and never recovers. I’m not sure whether the problem is caused by the driver, the monitor, or Windows itself.

#No signal with 5080 hdmi