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

2014-03-19T02:27:45+00:00

Same issue on desktop and Nvidia GT 520 card.
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Anonymous

2014-03-02T05:04:54+00:00
I would like to confirm my laptop ASUS K55V has the same issue.

HDMI worked out of the box connected to brand-new Polaroid HDTV for a week.

Then, on Monday AM I worked using the HDTV external Montior. I shut the laptop, Two hours later I resumed use, HDTV was no longer detected.

In fact it falsely reports a VGA Monitor (Never had one, doesn't exist, don't even own a VGA cable!).

HDMI cable and TV are not an issue. I tested connecting a camcorder via HDMI to HDTV and all is well.

Here is what I have done, Nothing worked.
1. Uninstalled HD4000 driver, rebooted and reinstalled driver. Negative
2. Uninstalled NVIDIA 630M driver, rebooted and reinstalled latest driver, Negative
3. Uninstalled both drivers and rebooted. Negative
4. TV off and ASUS off, plugged in HDMI, turned on HDTV first then ASUS. Negative
5, . TV off and ASUS off, plugged in HDMI, turned on ASUS first then HDTV. Negative
1. TV on and ASUS off, plugged in HDMI, turned on ASUS. Negative
2. TV off and ASUS on, plugged in HDMI, turned on TV . Negative
3. Checked display resolution 1920x1080 (HDTV Specs) and refresh rate 60hz
9. Uninstalled ghost VGA Monitor in device manager, rebooted. Negative, ghost returns.
1. Performed Restore system to earlier point when HDTV showed in Device Manager. Negative.
In all cases Display now says "No undetected monitor".
1. Downloaded and installed drivers from ASUS website. Negative
2. Downloaded and installed drivers from Nvidia website.Negative
3. Downloaded and installed drivers from Intel website. Negative
Some forum poster report success by using a HDMI cable with "longer connectors".

Any insight would be appreciated. Thank you.
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