Windows 8.1 HDMI output not working at all

Anonymous

Hello,

I recently purchased a new laptop with Windows 8, which I had never tried before (so I am new to this). I updated to 8.1 the other day, and afterwards I tried connecting the laptop to a brand new LG HD TV through the HDMI ports. I opened the "Project" menu and selected "Duplicate", and while I see something change on my laptop screen (it flickers, and the resolution/colours change), the TV picks up no signal.

The HDMI port on the TV is working correctly (tried it with another device), and so is the HDMI cable. There is some sort of connection happening because the TV enables the HDMI input only when something is detected on the other side of the cable.

I have seen that it might be a known issue with Windows 8.1, but I can't find a solution anywhere. My laptop has an integrated Intel GPU as well as an nVidia GeForce 740M, and I thought perhaps the problem was that it uses the Intel card as a standard, only switching to the nVidia when necessary, but the HDMI is "controlled" by the nVidia. So I've tried disabling the integrated GPU (to no avail - it just switches to the Microsoft Basic one rather than to the better card - this has been checked through dxdiag), as well as uninstalling and reinstalling the nVidia drivers (which were up to date to begin with). I have checked the BIOS to see if I could change the priorities, but there was no option like I see on my Windows 7 desktop.

Is there anything else I can try? It seems really silly to me that I cannot use the HDMI output at all!

Thank you for any help.

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Answer accepted by question author

Anonymous

Hi Nicholas,

Thank you for the updates.

Since the issue persists, you may try the following steps and check:

Method 1:

Please follow the steps given below to uninstall the display driver.

a) Press Windows key + X key when you are at desktop.

b) Select Device Manager.

c) Find and double-click Display driver from the left panel to uninstall.****d) Right-click the device, and click Uninstall.

e) Windows will prompt you to confirm the device’s removal. Click OK to remove the driver.

f) After the uninstallation is complete, reboot your computer.

After you have successfully uninstalled the driver, please go to the computer manufacturer’s website, download the Windows 8.1 display driver for NVidia and check.

Method 2:

You may also check with LG support to see if you need to install any firmware updates for the TV.

You may also try running the Windows Updates and install all the available updates including the optional driver and firmware updates.

Windows Update: Frequently Asked Questions

You may also refer to the articles and check:

Get the best display on your monitor

Connect a second monitor or projector

Hope the information helps. Let us know if you need further assistance with Windows related issues. We will be happy to help.

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Answer accepted by question author

Anonymous

Did the system restore, it did the trick. This is with a Windows 8.1 computer. I can't find the specific upgrade that did this, but it was an automatic upgrade I did on september 9. There was nothing else done this day. other than "Windows Update", so that IS the problem. I hope this helps anyone!

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Anonymous

Thanks bro..

Another solution I have found that

Some graphics cards have their HDMI port a little loose (cant observe).

So put your HDMI plug very tightly in the GDs HDMI port it will

100% work all time.

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132 additional answers

Anonymous

2014-05-24T23:40:53+00:00

Same issue here. I have a DELL XPS with nVidia 530. Window 8.1 wouldn't detect the HDMI connected monitor. Nothing pops up on the device manager's list either.

I tried all of the previous suggestions and ABSOLUTELY no change on my end.

I would appreciate if someone could help.

Thanks
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Anonymous

2014-05-23T16:33:41+00:00

Same with my Notebook, a HP Pavilion DV6.

Windows 8 worked fine with the HDMI port and an external display. Since the update to Win 8.1 the HDMI port isn't working anymore.

The DV6 includes two graphic devices, an internal Intel HD graphics device for low energy consumption and an extra AMD mobility Radeon HD 5000 Series graphic adaptor.

On VGA output: Sometimes I am not able to extend the Windows Desktop to both Displays, my Notebooks and the external Display. Ist showing the Desktop only on the external Screen.

Then I have to reinstall the AMD Driver and extending the Desktop to both Screens works fine for a while.

I assume this a Windows Driver Issue for the AMD Adaptor.

HDMI doesn't works at all.

When I plug in a HDMI cable, Windows is playing that "plugin sound". But the external Screen still does not receive a signal.

I worked several years for Microsoft. I do know that These issues after an update are rare. But in this case ist a Major issue for many desktop users! Please fix this!
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