Samsung tv not recognizing HDMI input ( SOLVED!)

When you have a Samsung TV not recognizing HDMI input, it can be worrisome for most people. But why do Samsung TVs sometimes fail to recognize HDMI input?

As a general guide, the main reason why Samsung tv may not be recognizing HDMI input is due to residue dry sodering shorting other vital parts on its main peripheral control board and because of faulty settings of the HDMI control board.

How To Fix HDMI No Signal

To resolve HDMI no signal on Samsung TV that is not recognizing HDMI inputs requires following the simple steps to resolve the connection error.

You can easily solve your Samsung TV not recognizing HDMI input by following the step-by-step guide provided below. Keep in mind that, don’t be scared to experiment around with any of these settings as you risk losing your warranty..

These are the 5 things to do if your Samsung TV is not recognizing HDMI input:

Remove The Backplate Of the Samsung TV To Fix The Tv not recognizing HDMI input Error.

If your Samsung TV does not recognize HDMI input, it could be corroded by dry sodering. To fix this, you will have to open up the backplate of the TV and physically remove any dry sodering residue on the main peripheral control board.

This is usually done by removing the backplate of your TV and using a pencil eraser to remove any dry sodering residue on the main control board. However, you have to be very careful when doing so as adding too much pressure will damage the board itself.

After this, simply reassemble the TV and you should be ready to try out your HDMI input once again.

Change the HDMI control board settings of the Samsung television.

Another common reason why Samsung TVs fail to recognize HDMI input is due to faulty or damaged settings of its main peripheral control board. To solve this, simply reset your Samsung smart tv to factory settings.

This is done by following the simple steps below:

1. Press your TV’s info, then the “Menu” button followed by the mute and stand by or on /off power button to trigger the tv to display the flash reset menu.

2. Use the arrow buttons to select the “System” icon, then scroll down to the flash reset button to press OK for the Samsung tv to revert back to factory settings.

3. After this, you will have to reboot your TV from its main menu and you should be good to go.

If the HDMI control board is damaged, it may cost a few hundred dollars to replace so if you can’t access factory settings on it, I’d advise against repairing the peripheral control board as replacing it yourself.

How do I turn on HDMI auto-detect on my Samsung TV?

Samsung smart TVs come with built-in technology that allows these smart tv screens to automatically detect HDMI input when it is connected to any of it’s input. But how do you turn on the HDMI auto-detect feature of the smart tv screen?

As a general guide, you can turn on or off this HDMI auto-detect function by following these two steps:

1. Press your TV’s home button on the remote control followed by the “Menu” button to access your smart tv settings main menu.

2. Scroll down from settings> to General where you can select external device management console to view and interact with >Anynet+( the HDMI-CEC to manually turn it on or off.

Finally, connect a device with an HDMI cable and then turn on the TV; it will automatically connect to it.

What causes HDMI ports to stop working?

The most common causes of HDMI ports to stop working on Samsung smart TVs are:

Corrosion of the motherboard or dry soldering.

The corrosion of the motherboard or dry soldering can have a huge impact on your smart tv to hinder HDMI ports network routes for digital data packet tunnels.

Thus, if you want to remove this corrosion build-up and clean the HDMI output sockets. you must first open your device’s backplate.

Remove corrosion from the Tv’s motherboard or dry-sodering residue on the peripheral control board.

After which you can simply use a pencil eraser to get rid of any accumulated dry soldering residue on the HDMI output sockets.

This is usually done by using a sharp pointing tunnel eraser to remove any accumulated dry soldering debris from the peripheral control board.

However, you must be very careful when doing so as adding too much pressure will damage the board itself at the gold point connections.

After this, simply reassemble the TV and you should have it working as normal again.

This is very common particularly where overheating of the AC adapter (the AC power converter that sends power to your TV) if this is fried, it may not be sending any power at all resulting in a non-working HDMI port on your TV.

Also, keep in mind that HDMI ports are sensitive to dirt and dust. If left uncleaned, these can also make your HDMI port stop working.

So it’s good practice to periodically clean the entire board with isopropyl alcohol after every few months of use, just to prevent circuit failure on your TV screen in the future.

Why does my tv not recognize my HDMI cable?

There are plenty of possible reasons why your tv may not be recognizing your HDMI cable, however, one of the most common problems is mismatched HDMI input cable standards.

HDMI input cables have varying standards that define the maximum bandwidth of HDMI signals they can carry, so it’s important to connect a cable with the same standard as your TV.

For example, if you have an HDTV with a 60Hz refresh rate and a resolution of 1080p or higher, you need a high-speed HDMI cable to guarantee an error-free transmission.

2.1 HDMI cables with Ethernet

HDMI cables with Ethernet deliver the same high-quality video, so they should work perfectly to deliver pictures and sound to your smart TV.

However, there are various types of HDMI cables available to buy, so it’s important to choose wisely and go for one that can use the TV’s HDMI Input port.

2.1.1 Standard HDMI cable

A standard HDMI cable transmits signal data at speeds of 75mbps over a single cable. All you need to do is connect one end of the cable into your TV’s HDMI port and the other side into an external device, such as a Blu-ray player or game console.

However, if these powerful HDMI cables are plugged into the incompatible HDMI ports, no signal should be expected.

2.1.2 High-speed HDMI cable

Another reason why your tv may not be able to display HDMI is due to their incompatibility issues with the high-speed HDMI cable that is designed to carry a signal of up to 18gbps and is the best option for connecting external devices such as HDTVs, Blu-ray players, projectors, computers, and gaming consoles.

It also works with 4K TVs that support 4K resolution at 30Hz refresh rates, unlike previous HDMI standards.


Overall, if you’re having problems with HDMI ports and cables on your tv, don’t panic. It’s likely that the problem lies in the HDMI cable or device not being turned on or plugged in properly.

Even so, if you want to ensure optimum functionality of your smart TV, it is still a good idea to clean its connectors regularly using a cotton swab, as well as run a quick test on your HDMI ports’ connectivity.

This usually only takes a few minutes and can help you quickly determine whether the issue is with your TV’s HDMI output or not.

If all else fails, it also wouldn’t hurt to contact your TV manufacturer or take your smart TV for repair if it is within the warranty.

Recent Posts