How to Connect Your LG Soundbar to Your TV

The fastest way: HDMI with ARC or eARC

Most LG soundbars connect to your TV using a single HDMI cable plugged into the HDMI ARC port on your TV. ARC stands for Audio Return Channel — it lets your TV send sound back to the soundbar through the same cable that carries picture to the TV. This is the simplest setup because you only need one cable, and your TV remote can control the soundbar volume.

Find the HDMI port on your TV labeled ARC or eARC (enhanced Audio Return Channel). On most LG TVs, this is HDMI 3 or HDMI 4, but check your TV's manual to be sure. Plug one end of an HDMI cable into that port and the other end into the HDMI input on the back of your soundbar. Turn on both devices. Your TV should recognize the soundbar automatically within a few seconds.

If your TV and soundbar both support eARC, use that port instead — it handles higher-quality sound formats and is faster than standard ARC. The setup is identical; just make sure you are using the eARC port specifically.

Key Takeaways

HDMI ARC is the simplest connection: one cable from your TV's ARC port to the soundbar, and your TV remote controls volume.
Check your TV manual to find which HDMI port supports ARC or eARC, because it is not always the same port number.
If HDMI does not work, use an optical cable from your TV's digital audio output to the soundbar's optical input.
Bluetooth is an option for streaming from your phone or tablet, but it does not work for TV sound unless you set up a workaround.
If the soundbar does not appear in your TV settings after connecting, restart both devices and check that the cable is fully seated in both ports.

Optical cable: the backup when HDMI ARC is not available

If your TV does not have an ARC port, or if HDMI is not working, use a digital optical cable instead. This is a thin cable with a small square connector on each end. Plug one end into your TV's digital audio output port (sometimes labeled S/PDIF or Optical Out) and the other end into the optical input on the back of your soundbar.

Optical cables carry high-quality sound but cannot send commands back to your TV, so you will need to use your soundbar's remote to adjust volume instead of your TV remote. The connection is reliable and works with older TVs that do not have HDMI ARC.

Make sure your TV is set to output sound through the optical port. Go to your TV's audio settings and select Digital Audio Output or Optical Out. If you see options for PCM or Dolby Digital, either one works — PCM is standard stereo, and Dolby Digital is surround sound if your soundbar supports it.

Bluetooth: for phones and tablets, not TV sound

LG soundbars have Bluetooth built in, but it is designed for streaming music from your phone or tablet, not for TV sound. If you want to use Bluetooth to listen to your TV, you would need to pair your TV to the soundbar, and most TVs do not support this pairing.

To connect your phone or tablet to the soundbar via Bluetooth, press the Bluetooth button on the soundbar remote or the soundbar itself. The soundbar will enter pairing mode (usually indicated by a flashing light). Open Bluetooth settings on your phone, find the soundbar in the list of available devices, and tap to connect. Once paired, your phone will reconnect automatically when you turn the soundbar on.

What to do if your soundbar does not show up on your TV

If you connected the HDMI cable but your TV is not recognizing the soundbar, start by restarting both devices. Unplug the soundbar for 30 seconds, plug it back in, and wait for it to fully power on. Then restart your TV using the remote power button.

Next, check that the HDMI cable is pushed all the way into both ports — a loose connection is the most common reason for no sound. If the cable looks find, try a different HDMI cable to rule out a damaged one.

Go into your TV's audio settings and look for an option called HDMI Audio Format, HDMI Sound, or Audio Output. Make sure it is set to output through HDMI rather than the TV's built-in speakers. Some LG TVs have a setting called Sound Output that you need to change from Speaker to HDMI or External Speaker. If you see an option to enable ARC, make sure it is turned on.

Connecting multiple devices: TV, cable box, and streaming apps

If you have a cable box or satellite receiver, connect it to your TV with HDMI as usual. The soundbar stays connected to the TV's ARC port. Your TV will mix all the sound from the cable box, streaming apps, and built-in TV apps and send it to the soundbar through the ARC connection. You do not need separate cables for each device.

If you use a streaming device like a Roku, Apple TV, or Fire Stick, connect it to your TV with HDMI, and again, the soundbar handles all the sound through the TV's ARC port. The only exception is if your streaming device has its own optical or HDMI audio output — in that case, you can connect it directly to the soundbar, but this is rarely necessary and makes setup more complicated.

Soundbar settings to check after connecting

Once your soundbar is connected and producing sound, check the input source on the soundbar itself. Press the Input or Source button on the soundbar remote. Make sure it is set to HDMI or Optical, depending on which cable you used. If it is set to Bluetooth or Aux, the soundbar will not receive sound from your TV.

If your soundbar has a night mode or volume limit setting, check those too. Some LG soundbars have a maximum volume cap that can make them sound quieter than expected. You can usually adjust this in the soundbar's menu, accessed through the remote or through an LG mobile app if your soundbar supports it.

When to call LG support or a technician

If you have tried HDMI and optical cables, restarted both devices, checked all the settings, and still have no sound, the issue is likely a defective HDMI port on your TV or soundbar, or a damaged cable. At this point, contact LG support with your soundbar model number (found on the back of the unit or in the manual). They can walk you through additional troubleshooting or arrange a replacement if the soundbar is still under warranty.

If your TV is not an LG model, contact the TV manufacturer's support line instead — they can confirm whether your TV's ARC port is working and whether there are any TV-specific settings you need to change.

Frequently Asked Questions

Do I need a special HDMI cable for ARC?

No. Any standard HDMI cable works with ARC. You do not need to buy an expensive "ARC cable" — the difference is in the port on your TV and soundbar, not the cable itself. A cable that cost $5 works the same as one that cost $50.

Can I use both HDMI and optical cables at the same time?

You can plug both cables in, but your soundbar will only listen to one input at a time. Use the Input button on the soundbar remote to switch between them. Most people choose HDMI because it is simpler and works with the TV remote.

Why is there no sound even though the soundbar is connected?

Check three things: the soundbar's input is set to HDMI or Optical (not Bluetooth), the TV's audio output is set to HDMI or Optical (not TV Speaker), and the volume on both the soundbar and TV is turned up. If all three are correct, restart both devices and try a different HDMI cable.

Will my TV remote control the soundbar volume if I use an optical cable?

No. Optical cables only carry sound, not control signals. You will need to use the soundbar's remote to adjust volume. If you want TV remote control, use HDMI ARC instead.

Can I connect my soundbar to my TV wirelessly without Bluetooth?

No. LG soundbars do not support Wi-Fi direct connection to your TV. Bluetooth works only for phones and tablets. For TV sound, you need either HDMI ARC or an optical cable.

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.