Several issues can arise when HDMI is not working in Windows 7.
When you connect your laptop or PC using HDMI cable, you may not be able to hear audio from TV but can see the video.
In other cases, multiple monitors may not be working connected over HDMI to Windows 7 desktop.
The following are some of the use-cases to solve the HDMI problem in Windows 7:
- Install the right driver from the manufacturer.
- Allow Windows to automatically detect the driver. (if an original driver is not available)
- Use a working HDMI port.
- Different types of HDMI exist like 1.1., 1.2, 1.3, 1.4 and 2.0.
- Check whether you are using the compatible HDMI wire for PC port.
- Is your HDMI cable twisted? Check any bends!
- Have you selected the correct playback device in Control Panel “Sound” item?
- Is the graphics card adapter working correctly?
- If you are using VGA to HDMI or DVI to HDMI converter, are they working correctly?
Did you install the latest Windows 7 updates?
A simple tweak can solve most of your HDMI problems related to Windows 7.
For example, installing the right HD audio driver or graphics driver can eliminate the problems connecting Windows 7 to Smart TV through HDMI cable.
Some of the laptops, desktops, PCs having HDMI problems in Windows 7 are as follows:
- HP Pavilion dv6772nr Entertainment Notebook with an NVIDIA GeForce 8400M GS video card
- Acer Aspite Z3-710 and an NEC LCD 1970GX
- Windows 7 connecting to dual monitors like LCD Acer monitor, and Sharp Aquos LCD TV.
- 2007 Gateway notebook
- Lenovo Yoga 2 Pro and a 5-year-old Element LCD TV
HDMI No Audio when Windows 7 connected to LCD TV through HDMI
Many kinds of devices like speakers are connected to your Windows 7 PC or laptop. So when you go to your Control Panel > Sound, you should see all the sound devices connected.
One of them could be your external speakers, PC speakers, and HD TV. In most of the cases, your TV will be displayed as HDMI in those available options.
But Windows by default will choose the last one and it may be your computer speakers.
Windows 7 desktop screen working properly.
So once you connect your Windows 7 to LCD TV, make sure that device (showing as HDMI) is made the default. This will solve your Windows 7 HDMI no audio, in most of the cases.
A typical problem in Vista, same like Windows 7 can be seen here –
“I’ve connected my desktop (windows vista, ATI 4770) to my Samsung 37″ LCD TV through an HDMI 1.3 cable. The video is excellent, but there is no sound coming out of my TV speakers.
I’ve set my desktop sound device to “High definition audio”, the sound device added to my computer after I installed the 4770 graphics card (so I know the graphics card supports sound), but nothing.“
Install Graphics card driver from the manufacturer
When you are using an old CPU, it is more likely you do not have an HDMI port at all. You would be connecting to the monitor using the VGA port.
In that case, most people tend to buy a new graphics card which has either a DVI or HDMI port.
If you want to connect to an HD TV with HDMI port only, then you need to buy a DVI to HDMI converter.
But most of the cases, Windows will install the default Microsoft driver for the graphics or GPU. This may work sometimes and many-a-times not.
In that case, you have to find the latest graphics drivers for your cards like AMD or NVIDIA and install them.
This should bring the display back again on your TV with your Windows 7 desktop screen working properly.
Problem with Windows 7 Updates
From the initial release in 2007 onwards there have been many updates to Windows 7.
In the form of SP1 and Convenience Roll up, these updates bring security and patch any loopholes in the OS.
On every Tuesday, if you check for updates, you can also see new KB updates for your Office, installed devices and OS.
Some of the users complain that HDMI is not working in Windows 7 after a particular update or upgrade.
This is a common nuisance with Windows systems.
A patch that may have closed a particular loop-hole can cause the issue to an HDMI device connecting to Windows 7.
So better roll-back, create a system restore before you make an update, uninstall the new updates and check if the HDMI video and audio are working properly or not.
If that’s the case, continue using the old version.
Another case of multiple-HDMI output devices connected to Windows 7
Multiple-monitors are generally used for blogging and another multi-media editing purpose. In such a scenario, you have dual monitors connected to your VGA and HDMI ports.
In such a case, make sure you go to “Display Properties” and see that both the monitors are detected. You can extend the display in the newest versions of Windows 7.
A typical problem, in this case, is –
“I have a laptop running Windows 7; I am trying to connect it to my TV, using the HDMI port on my laptop and an AV input on my TV; I have a cable with the correct ends on it, and I am certain my HDMI port and my TV are both working.
The problem seems to be that the Windows 7 “connect to a projector” options do not allow one to use the HDMI port as an output for this purpose; How do I do this?“