How to Connect Your Device to a TV Using HDMI

The basic connection: what you need and where to plug in

An HDMI cable connects your device — a computer, streaming box, gaming console, or Blu-ray player — to your TV in one cable. The HDMI port on your TV is a flat, rectangular slot, usually on the back or side. One end of the cable plugs into your device, the other into the TV. That is the entire physical connection.

Before you plug anything in, turn off both your device and your TV. This is not strictly required, but it prevents any electrical surprises and gives you a clean start. Once both are off, insert the HDMI cable firmly into the port on your device first — you will feel a slight click when it seats properly. Then plug the other end into an HDMI port on your TV the same way.

Most TVs have multiple HDMI ports (usually three to four). It does not matter which one you use, but remember which port you chose — you will need to tell the TV to display from that port after you turn it back on.

Key Takeaways

HDMI cables are the standard way to connect devices to TVs and carry both picture and sound in a single cable.
The HDMI port is a flat rectangular slot on the back or side of your TV, and the cable plugs in firmly with a click.
After plugging in the cable, turn on your TV and use the remote to select the correct HDMI input — usually labeled HDMI 1, HDMI 2, or HDMI 3.
If your device does not have an HDMI port, you will need an adapter that matches your device type, such as USB-C to HDMI or DisplayPort to HDMI.
If the picture does not appear, check that the cable is fully inserted on both ends and that you have selected the right input on the TV.

Turning on the TV and selecting the right input

After both devices are plugged in, turn on your TV first using the power button on the remote or the TV itself. The TV will display whatever input it was last set to — often a cable box, antenna, or a previous HDMI port. You need to switch it to the HDMI port where you plugged in your cable.

Look for a button on your TV remote labeled Input, Source, or HDMI. Press it. A menu will appear on your screen showing all the available inputs: HDMI 1, HDMI 2, HDMI 3, TV, or others. Use the arrow buttons on the remote to highlight the HDMI port you used, then press Enter or OK. The TV will switch to that input.

Now turn on your device. Within a few seconds, the picture from your device should appear on the TV screen. If it does not, the cable may not be fully seated — turn off both devices, reseat the cable on both ends with a firm push, and try again.

What to do if your device does not have an HDMI port

Older computers, tablets, and phones do not have HDMI ports. If your device has a different connector — USB-C, DisplayPort, Mini DisplayPort, Thunderbolt, or an older 30-pin connector — you will need an adapter. The adapter plugs into your device and has an HDMI port on the other end, so the HDMI cable can then connect to the TV.

Buy an adapter that matches your device's port type. Search for the name of your device plus "to HDMI adapter" — for example, "iPad USB-C to HDMI adapter" or "MacBook DisplayPort to HDMI adapter". These adapters cost between $15 and $40 and are sold at electronics retailers and online. Plug the adapter into your device first, then plug the HDMI cable into the adapter's HDMI port, then into the TV.

Some devices, particularly newer phones and tablets, can also send video wirelessly using AirPlay (Apple devices) or Miracast (Android devices). If you prefer not to use a cable, check whether your TV supports wireless casting — many modern TVs do. The setup is different from HDMI but avoids the need for an adapter.

Troubleshooting when the picture does not appear

If you have plugged in the cable, selected the correct input, and turned on your device but still see no picture, work through these steps in order. First, turn off both the TV and the device. Wait 10 seconds. Turn the TV back on, then turn the device back on. This clears temporary glitches that sometimes prevent the signal from being recognized.

If that does not work, turn off both devices again. Unplug the HDMI cable from both ends. Look at both the cable connector and the ports on the TV and device — make sure there is no visible dirt, lint, or damage. Plug the cable back in firmly on both ends, making sure you hear or feel the click. Turn both devices back on and check the input again.

If the picture still does not appear, try a different HDMI port on the TV. Some ports can fail, and switching to HDMI 2 or HDMI 3 often solves the problem. If a different port works, the original port is faulty and you can use the working port going forward. If no HDMI port works, the cable itself may be damaged — try borrowing a cable from a friend to test, or buy a new one.

Sound not working even though the picture is there

HDMI carries both picture and sound, so sound should work automatically once the picture appears. If you see the picture but hear nothing, first check the volume on your device — it may be muted or set very low. Then check the TV volume using the remote.

If both volumes are up but you still hear nothing, go into your device's sound settings and look for an audio output option. Some devices default to their internal speaker or a different output. Change the audio output to HDMI or to your TV. The exact menu location varies by device — search for "[your device name] HDMI audio settings" if you are unsure where to find it.

On Windows computers, right-click the speaker icon in the bottom right corner, select Open Sound settings, scroll down to Advanced, and look for an option to choose your audio output device. Select your TV from the list. On Mac computers, go to System Preferences > Sound > Output and select your TV.

Keeping your HDMI setup stable

Once everything is working, a few straightforward habits will keep it that way. Do not repeatedly unplug and replug the cable — each connection weakens the port slightly. If you need to disconnect, do it infrequently and handle the cable gently. Keep the cable away from heat sources, sharp edges, and places where people might trip on it.

If you have multiple devices to connect — a computer, a streaming box, and a gaming console — you can leave each one plugged into a different HDMI port. Just switch inputs on the TV remote when you want to use a different device. This avoids the wear and tear of constant unplugging.

HDMI cables do not wear out from use, but they can be damaged by bending, crushing, or exposure to extreme heat. A cable that works today will work in five years if treated normally. If you move your TV or rearrange your setup, check that the cable is not pinched behind furniture or kinked sharply.

Frequently Asked Questions

Do I need a special HDMI cable for 4K or newer TVs?

Standard HDMI cables work with 4K TVs, but if you want to use 4K resolution, you should use a cable labeled HDMI 2.0 or higher. Older HDMI cables can carry 4K video but may have stability issues. For most people, any HDMI cable works fine — the difference only matters if you are using a 4K source like a 4K streaming device or gaming console.

Can I use the same HDMI port for multiple devices at once?

No. One HDMI port connects to one device at a time. If you have multiple devices, plug each into a different HDMI port on the TV and switch between them using the input button on the remote. Most TVs have three to four HDMI ports, which is enough for a computer, streaming box, and gaming console.

Is it safe to leave an HDMI cable plugged in all the time?

Yes. Leaving a cable plugged in does not damage the TV, the device, or the cable. The only wear comes from repeatedly plugging and unplugging. If you have a permanent setup — a computer connected to a TV that stays in one place — you can leave the cable plugged in indefinitely.

What if my TV is very old and does not have HDMI ports?

Older TVs with only composite (red, white, yellow) or component (red, green, blue) ports cannot accept HDMI directly. You would need a converter box that takes HDMI input and outputs composite or component video. These are inexpensive but add another device to your setup. For most people, upgrading to a TV with HDMI is simpler and more reliable.

Why does my picture cut out or flicker after the connection works?

Flickering usually means the cable is not fully seated or is slightly loose. Turn off both devices, unplug the cable, and plug it back in firmly on both ends. If flickering continues, try a different HDMI port on the TV. If it persists across multiple ports, the cable may be damaged and should be replaced.

This guide is for general information only and is not medical, financial, legal, or other professional advice. For decisions specific to your situation, consult a qualified professional. See our Editorial Policy.