The coronavirus pandemic made people spend more and more time at home. A new habit for people is to watch the news or TV shows. The quality of the TV is a very important aspect. For starters, it is important to mention that TVs differ depending on: resolution, diagonal, screen technology, SMART TV functions, audio and video performance.

Why Does My TV Say No Signal When HDMI Is Plugged In?

1. How to choose your TV

The diagonal is the size of the screen. Televisions generally have a diagonal of 4k and 40 inches. There are also three types of TVs depending on the price and diagonal: entry, middle, high tech. Entry TVs are the basic ones, cheap, bought for price reasons and less for audio and video quality. Middle TVs offer better quality and a Smart TV interface at a decent price. The high end is TVs that have state-of-the-art technologies to provide a superior picture and sound. They have a special design the Smart TV interface is very complex and fast and offers the latest innovations in the field of TV screens.

If you want to choose a TV for a good resolution you can choose between HD ready, Full HD or Ultra HD 4K. HD Ready TVs have a resolution of 1280 x 720 pixels. It is an ok resolution for diagonals up to 32 inches. If the diagonal is larger, the HD Ready resolution generates a slightly pixelated, poor quality image. Full HD TVs have a screen resolution of 1920 x 1080 pixels. Suitable for diagonals up to 40-43 inches. 

At larger diagonals, if we are very close to the TV, you can see a blur image, 4K Ultra HD TVs have a resolution of approximately 4000 x 2000 pixels. It is the best performance at this time when we talk about TVs that we can buy in stores. It offers a very high-quality image regardless of the diagonal

2. What is HDMI

Everyone who has a high-definition TV or a home cinema system is familiar with this term, HDMI cable. HDMI is the abbreviation for High-Definition Multimedia Interface, and its name basically shows what you can do with such a cable. Mainly, you need to know that everything that means high-definition content, audio and image, is transmitted through a single cable. Another thing you need to know about HDMI cables is that there are several versions. These are: HDMI 1.0, HDMI1.1, HDMI 1.2, HDMI 1.2a, HDMI 1.3.

There are not many differences between these variants and they use the same types of connectors and retainers: each new variant is compatible with previous models, so you will not have any unpleasant surprises! Any audio or video equipment you have can be used with any HDMI model, regardless of the latest version.

HDMI Ethernet Channel (HEC)

HDMI Ethernet Channel is the most interesting feature added with version 1.4. By using this function, up to 100 Mbit / s can be transmitted via the same cable internet traffic. With this HDMI you can share a single Internet connection between two devices.

HDMI ARC (Audio Return Channel)

With the advent of the HDMI Ethernet Channel, the HDMI Audio Return Channel option has been added. HDMI ARC is an abbreviation for return audio channel.

HDMI CEC (Consumer Electronics Control)

The CEC function allows the control of several devices using a single remote control. The maximum number of devices that can be controlled by a single remote control is 15.

3. Choosing the best HDMI and what problems can appear

Choosing the best HDMI depends on your preferences. If you want a device to help you operate multiple TVs using a single remote, it is recommended that you choose HDMI CEC. Instead, if you want to share the same internet connection on two TVs, it is recommended that you choose HDMI Ethernet Channel.

There are many problems that can appear using a HDMI and resutls a no signal” message on our TVs.

If you see a "no signal" message it is important to check some things. First of all, it should be a improper connection.  If you connect HDMI to any other external device, various problems may occur. To avoid them, make sure that the TV has a good connection. If you want to check the connection, all you have to do is to click on the Start button and the input device will appear on the screen. Another step essential in this category is checking if the external device and the HDMI have a good connection.

Another reason why the "no signal" message may appear on the TV may result from cable damage. It is very important to check every time that it is in optimal condition. Like any other object, the cable can be damaged if it is not kept safe or used too often. If you see signs of damage to the cable or the connection is no longer good, replace it. This can solve your problem.

Also, it is not necessarily a problem related to the equipment you use such as cable or external device. There may be a simple problem with the supplier. Sometimes the antenna cannot get a good signal. To solve this problem you can try to reset the TV. Specifically, you can give a new search for channels.


With the advancement of new technologies and the advent of various devices, there may be new problems. If your TV shows the message "no signal" the source of the problem may be multiple. The most important thing is to take each problem step by step and see where it comes from. As it is mentioned in the article, the problems can be due to the TV, the plug, the cable, the external devices or maybe from a bad network connection. The important thing is that for every problem there is a solution.