Graphics Card not working through HDMI after using DisplayPort

[Marky]

Hi all,

I’m hoping that I’m just being stupid here and that there’s a quick solution to a relatively simple problem

I have a 1080Ti and I normally connect it to a monitor using DisplayPort.

I’ve disconnected my computer and connected it to my TV using HDMI.

When I turn it on, I see the BIOS startup screen on my TV, but once that disappears, I lose signal completely.

I suspect as I normally use DisplayPort, that it defaults to that output hence why I don’t get anything from the HDMI port. How can I resolve this and use the HDMI port for the TV?

Any help will be greatly appreciated

Thanks,
Marky

 

[tommybhoy]

Windows possibly went dual monitor mode, Hold in Win key and tap P, might have to slow tap the P a few times, if that doesn't work, hold in Win key, tap P once then tap left or right arrow key.

 

[Marky]

Windows possibly went dual monitor mode, Hold in Win key and tap P, might have to slow tap the P a few times, if that doesn't work, hold in Win key, tap P once then tap left or right arrow key.

Didn’t work I’m afraid

I don’t have the DisplayPort connected if that matters - Just the TV via HDMI.

 

[tommybhoy]

No shouldn't matter, I'd go safe mode then and confirm you get a display once booted.

If it does, while you are there, you could try disabling intel gfx while in safe mode(might not be showing but I used to have to do that with Sabertooth z77 or I'd get no display after windows boot screen)reboot.

If still doesn't work, safe mode uninstall drivers/reboot.

 

[Marky]

No shouldn't matter, I'd go safe mode then and confirm you get a display once booted.

If it does, while you are there, you could try disabling intel gfx while in safe mode(might not be showing but I used to have to do that with Sabertooth z77 or I'd get no display after windows boot screen)reboot.

If still doesn't work, safe mode uninstall drivers/reboot.

Tried Safe Mode to no avail

Changed the HDMI cable just in case - and it works perfectly

So strange that it displays the BIOS screen no problem but it stops working once it gets to Windows.

Can’t explain it, but it’s working with a different HDMI cable and that’s all that matters

Thanks a lot for your suggestions!

 

[tommybhoy]

lol

 

[AdamScott85]

Tried to clear CMOS and see if that works?

 

[Rroff]

Tried Safe Mode to no avail

Changed the HDMI cable just in case - and it works perfectly

So strange that it displays the BIOS screen no problem but it stops working once it gets to Windows.

Can’t explain it, but it’s working with a different HDMI cable and that’s all that matters

Thanks a lot for your suggestions!

BIOS screen will use considerably less bandwidth and be stable with a poor signal - a 1080p desktop - never mind if the TV is 4K capable will be a lot more fussy about cable.

 

[MartinPrince]

Changed the HDMI cable just in case - and it works perfectly

So strange that it displays the BIOS screen no problem but it stops working once it gets to Windows.

Can’t explain it, but it’s working with a different HDMI cable and that’s all that matters

There is a myth that as HDMI is digital that cheap cables are just the same as more expensive cables. You are finding out first hand that this is not the case (as I have also done). Also the bios screen on load is not using your TV's full resolution so the HDMI cable could handle that, which is why you saw it initially but not when Windows loaded where it switches to the full native resolution.

 

[Marky]

BIOS screen will use considerably less bandwidth and be stable with a poor signal - a 1080p desktop - never mind if the TV is 4K capable will be a lot more fussy about cable.

There is a myth that as HDMI is digital that cheap cables are just the same as more expensive cables. You are finding out first hand that this is not the case (as I have also done). Also the bios screen on load is not using your TV's full resolution so the HDMI cable could handle that, which is why you saw it initially but not when Windows loaded where it switches to the full native resolution.

Thanks guys - So I need to replace this cable as the cable I’ve used was being used elsewhere. What should I be looking out for in terms of HDMI cable? It’s a 4K TV.

 

[nlel1975]

Cheap HDMI cables are usually fine, but I had one that I gave to my nephew when I donated my PS3 to him and the signal kept cutting out randomly, he had to buy a new cable. I never used the cable I gave him much so never noticed the problem.

 

[MartinPrince]

Thanks guys - So I need to replace this cable as the cable I’ve used was being used elsewhere. What should I be looking out for in terms of HDMI cable? It’s a 4K TV.

When you do your search do it for HDMI 2.0 or even HDMI 2.1 which came out last year. You don't need to go wild as there are many in the ~ £5 range that will do the job fine.