How To Fix Motherboard HDMI No Signal [2023]

Written By FarhanMax

You are trying to use your old TV as a second monitor and since there is no VGA cable in a TV, you are using the HDMI cable. The problem is that the TV doesn’t seem to display anything no matter how many times you try connecting it.

You must be wondering:


Why is my motherboard HDMI not working?

Your motherboard HDMI might be having issues because of a variety of reasons. One of these issues could be that you haven’t enabled the CPU onboard graphics HDMI output in the BIOS. You also need to verify that the cable has been firmly plugged into the ports.

You don’t need to worry much longer. This exact issue happened to me last year and I tried several methods before getting to the right solution. I will make things much easier for you by only talking about solutions that are guaranteed to work.

So, without further ado, just grab a cup of coffee and remember to not skip any sections while reading this article.

Follow our guide on how to Fix Motherboard Error 99

Can You Use Motherboard HDMI With Graphics Card?

Yes, you will definitely be able to do this by using the ports available on the GPU. Keep in mind that your graphics card only has a display port and a DVI port so your second monitor should have these ports as well.

Don’t worry, if you do end up with a monitor that doesn’t come with these ports or you want to use your TV, you can still the HDMI port on those devices with the GPU by using a display port to HDMI cable.

Another important point to note here is that your motherboard’s BIOS should fully support the feature of using multiple displays simultaneously if you plan to use two monitors at the same time.


Some motherboards automatically enable this option but you should still check if it’s enabled in BIOS. The option I am talking about can be found in BIOS and this enables multi-monitor support for your motherboard.

Simply go to your BIOS settings and enable an option called onboard video under graphics configuration. Do note that enabling this will result in a bit of lower performance depending on the motherboard.

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How To Fix Motherboard HDMI No Signal

Now that you have a clear idea about where this issue could be coming from, let’s talk about how to get rid of this annoying problem. I have listed five of the simplest methods that will fix your problem without any hassle.

Before we get into the real stuff, I have to let you know that you must make sure that your system has an integrated graphics card, also known as iGPU.

The reason for this is that motherboards don’t actually have the capability to process videos on their own. In fact, every video output port on the back of the motherboard is powered by the CPU’s integrated graphics card.

Check out our separate post on Motherboard Affecting Performance on PC.

If you have an Intel motherboard, you probably have this feature but few motherboards don’t have this.

Follow these steps to check if you have an integrated GPU:

  • Open up the Start menu.
  • Search for Device Manager and click on the first result.
  • Double click on the Display Adaptors option to expand it.
  • You are free to proceed with the fixes if you see an iGPU here.

If you don’t see anything, then you need to upgrade your CPU with one that has an integrated GPU.

Now, that you are done with the first step, let’s look at the fixes.

Go through our epic guide on Will Motherboard Turn On Without CPU.

Here are the ways to fix motherboard HDMI no signal:

1. Enable HDMI In BIOS

You might be getting the no signal error because integrated graphics is disabled by default in your system. So, you will just have to simply enable it from BIOS.


You may also like to read: Will a Motherboard POST Without a CPU

Follow these steps:

  • Turn off your system completely.
  • Turn on your PC and this time keep pressing the Esc key repeatedly until you see a menu appear.
  • Look for the key next to BIOS settings and press that on your keyboard.
  • Your BIOS settings will appear. Now, it will be tricky because this option typically has different labels on different computers.
  • Look for a setting like Enable iGPU or Enable Multi-GPU support and turn it on.
  • After this is done, save and exit.

If you try plugging in the HDMI cable now, it should be working flawlessly. This should fix the issue for most users but if your setting in BIOS was already switched on, keep reading.

Also, if you didn’t find any such option in your BIOS, then you can try updating your integrated graphics drivers and then enable the option in BIOS.

Check out our separate post on how to Clean Thermal Paste on CPU Pins or Motherboard

2. Check The HDMI Cables

The next step is to verify that your HDMI cable is perfectly intact and not damaged in any way.

The best way to do this is by simply connecting it to a friend’s computer and testing if it works. If you have access to multiple HDMI cables, it’s a good idea to test the results from using two or three different cables.


Also read, Can A CPU Break A Motherboard

3. Turn On The Monitor And Computer In Opposite Order

What I mean to say is that if you turned on the monitor first and then the computer, and that resulted in the no signal error, then you should try doing the opposite.

That is, try turning on the computer first and then the monitor. Keep in mind that I’m referring to the external device you are using for HDMI as a monitor, but it could be a TV too if that’s what you are using.

4. Update Your Firmware

This option will only work if you are trying to connect the HDMI to a TV display since we all know monitors don’t actually get any firmware updates.

This has worked for me a few times in the past but it doesn’t always work but you should still give this a shot.

The process for updating TV firmware varies from one TV to another but they are fairly easy to do. If you are having difficulty you can contact the support team for your TV.

Also, check out our separate post on Motherboard Boot Without CMOS Battery


Is there HDMI to DisplayPort?

Yes, there are adaptors for this if you want to connect an HDMI port to a DisplayPort-supported device.

How do I refresh my HDMI port?

Follow these steps. First, power on the HDMI device like your TV and boot your PC after that. Next, power off the TV and then unplug the HDMI cable from both ends for 1 minute. After that, just plug them back in and power on both devices.

Why is my second HDMI port not working?

That might be happening because you haven’t updated your drivers in a while or due to a few missed Windows Updates. Simply go to the Updates section in your settings and install the latest update.

Which is better HDMI or DisplayPort?

Both are good for different reasons. DisplayPort is definitely superior due to its support for higher bandwidth but HDMI is more widely used because it is supported on a lot more devices.

Final Thoughts

It can be extremely frustrating when you get issues like no signal on your TV but the best thing is, this issue can always be fixed very easily. 

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