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.

Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.

0 comments

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.

0 comments

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!

0 comments

Answer accepted by question author

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.

0 comments

132 additional answers

Anonymous

2015-01-30T05:29:04+00:00

and another one with the same issue, only the VGA connection is bogus too. I noticed that on my acer aspire v3 so I got a VGA to HDMI adapter (the tv doesn't have VGA) but it still didn't work. I've got another forum going where windows is responding but they are now saying it's a hardware issue when the only change was one of their thought forsaken updates.

Still waiting solution!
Was this answer helpful?

0 comments No comments
Anonymous

2015-01-29T11:02:42+00:00

Same thing happened to me yesterday.

I bought an ASUS laptop in mid 2014.

I have it connected to a Samsung TV via HDMI port

Since I purchased it I have used it almost daily and it worked almost perfectly.

( sometimes the picture would turn grayscale but it was never for longer than 5-10 seconds and never at a loss of sound )

Since yesterday evening it stopped working. I had done some work and turned it off.

an hour later when I came back to it I got the "HDMI port not connected" on my TV.

Tried switching HDMI cables out

Tried the NVidia update

Tried the uninstall and reinstall of NVidia driver

Tried enalbling/disabling .net3.5.1

Tried installing from ASUS

Spent 5 hours on this and trawling the net for solutions. nothing seems to work at all.

The HDMI cables work on my stationary computer, they also work when I try connecting to my TV box so they are NOT the issue!

My PC cant even figure out that there is a device connected via HDMI. It WRONGLY states that there is a VGA connection.

I havent used VGA cables since 2012 for anything and I don't even have one present in the house.

The laptop in question has never been connected to a VGA cable as far as it has been in my possession.

So im one of the sufferers too now.

Any resolution would be great Microsoft.

TYVM
Was this answer helpful?

0 comments No comments