When an LG sound bar is not working, check the three things LG’s manuals list first for a silent bar: the volume isn’t at its minimum, mute is off, and the Function button has the bar on the input your TV uses.

A slim soundbar on a low stand below a blank TV, with its remote beside it and its power cable running to a wall outlet

Skip them and a bar that suddenly went quiet looks broken, which is how a working soundbar gets reset and re-paired for nothing.

Every fix below comes from LG’s soundbar manuals and webOS TV guides and names its models, so you can tell a setting from a fault.

Start with the symptom, read the lights or display, and leave the reset for last, since LG’s current manuals document one only for Wi-Fi bars.

The first section sorts out whether the TV or the bar is at fault, which decides every later step.

Why Is My LG Sound Bar Not Working When It Has Power?

Those three checks open the “There is no sound” row of the troubleshooting table in LG’s S95TR owner’s manual. LG lists three reasons before any fault: the volume is at its minimum, mute is on, or the Function button has the bar on the wrong input.

The front edge of a slim soundbar with a row of five small round status lights all glowing orange
What you see What it means LG’s fix
All lights blinking orange, or MUTE on a display Mute is on Press Mute
Every light goes out as you turn it down Volume at minimum Press Volume up
Bar on Bluetooth or USB, TV on HDMI or optical Wrong input Press Function

Which light marks the TV input varies by bar, and the TV’s own menus are covered in the Sound Out, SIMPLINK, eARC and Digital Sound Output settings for each LG TV year.

On the S95TR and SC9S, holding Power for more than 3 seconds disconnects Wi-Fi and the bar stops making sound, so tap it instead.

If the bar has an HDMI input as well as its HDMI ARC port, the TV’s cable belongs in the ARC port, because a regular HDMI port on the bar takes audio from a source while the ARC/eARC port sends audio back from the TV. If the bar is silent on every source, the input-swap test (change source device, swap TV, try a known-good audio output) is the broader next step.

Why Is the LG Soundbar Connected but Not Playing Sound?

That ARC port is one of several places a connected bar goes quiet. When an LG soundbar is connected but not playing sound, LG’s manuals send you to the TV next, since each ends its connection steps by setting the TV to send its sound to the bar.

They put that setting in the TV’s Speaker menu, as HDMI ARC for an HDMI cable or Optical or External Speaker for an optical one, and note that the names vary by TV maker. LG’s webOS 25 guide has it under Sound > Sound Out > Use Wired Speaker, as HDMI(ARC) Device or Optical Out Device.

The same guide tells the TV from the bar: run Sound Self-diagnosis under Support first, then set Sound Out to Use TV Speaker and listen again. If the TV plays without a problem, LG says to check the soundbar’s connection and settings.

The source can be the silent part too. LG’s “There is no sound” row says to turn up a set-top box, portable device or Bluetooth device you’re playing from, and the webOS 25 guide adds that a set-top box set to 0 or mute plays no sound at all.

For programs that play no sound or only their background music, the guide points to Audio Language. If the bar plays a phone over Bluetooth but not the TV, the next two sections take the TV link one connection at a time.

Why Won’t HDMI ARC or eARC Work on an LG Soundbar?

The first of those connections is HDMI ARC. When HDMI ARC or eARC won’t work on an LG soundbar, check LG’s three setup steps in order: the cable from the bar’s TV port to the TV’s HDMI IN (ARC) port, the bar on its HDMI input, and the TV’s speaker output set to HDMI ARC.

Each LG manual names the bar’s TV port and its input sign in its own way:

LG bar TV port on the bar Press Function until
S20A, S30A, S60T HDMI TV (ARC) LED1 lights white
S95TR HDMI TV (eARC / ARC) LED1 lights white
SC9S HDMI TV (eARC / ARC) LED1 and LED2 light white
S75QR HDMI OUT (TV eARC/ARC) OPT/HDMI ARC shows, then ARC or E-ARC
S95QR HDMI TV (eARC / ARC) OPT/HDMI ARC shows, then ARC or E-ARC
Sound Suite H7 HDMI TV (eARC / ARC) HDMI ARC shows (Source button)

LG’s S95QR owner’s manual says ARC or E-ARC appears on the display once the TV is properly connected, so on the S75QR and S95QR a display stuck at OPT/HDMI ARC points to the TV.

On an LG TV, the webOS 25 guide says choosing HDMI(ARC) Device under Sound Out turns on SIMPLINK, LG’s name for HDMI-CEC, and turning SIMPLINK off reverts the output to its default setting. The webOS 24 guide asks for a high-speed HDMI cable with CEC for SIMPLINK, and the soundbar manuals for a certified cable with the HDMI logo.

For eARC, the S95TR, SC9S, S75QR, S95QR and Sound Suite H7 manuals say to make sure the TV supports it before turning it on, and LG’s webOS 24 and 25 guides switch it on at Sound > Advanced Settings > eARC Support. Those manuals list Dolby TrueHD, Dolby Atmos, DTS-HD Master Audio and DTS:X as E-ARC formats (the H7 names the two Dolby ones), and they say to enable eARC on the TV for WOW Orchestra, which plays the bar and the TV’s speakers together.

LG also warns that SIMPLINK may not work properly depending on the status of the bar or other connected devices, and the first row of its tables, for a bar that doesn’t work properly, is the unplug-and-replug in the reset section. On the Sound Suite H7, the bar’s own remote may not work while the TV’s Sound Mode Share is on over HDMI ARC.

How Do You Fix an LG Soundbar With No Sound Over Optical?

Optical is the other wired route, and it skips SIMPLINK and eARC. To fix an LG soundbar with no sound over optical, LG’s manuals give four steps: take the covers off both cable ends, run the cable from the TV’s OPTICAL OUT to the bar’s OPTICAL IN, press Function until the bar shows its optical input, and set the TV’s speaker output to Optical or External Speaker.

That input shows the same light or display as HDMI: LED1 white on the S30A, S60T and S95TR, LED1 and LED2 on the SC9S, and OPT/HDMI ARC on the S75QR and S95QR, which show LGOPT once an LG TV connects. The S20A and Sound Suite H7 have no optical input at all, only HDMI and USB.

One rule catches bars wired both ways. LG says that if the optical and ARC signals try to connect at the same time, the ARC signal takes priority, so a bar with an HDMI cable still in its ARC port plays that instead.

Optical also carries fewer formats: with Digital Sound Output on Auto or Pass Through, LG’s webOS 25 table sends Dolby Digital Plus, Atmos, Dolby TrueHD and AAC over optical as Dolby Digital. The LG TV remote controls volume and mute over optical only on TVs with LG Sound Sync, and LG’s row for it checks TV support, the cable and the TV’s LG Sound Sync setting.

The TV’s side of the hookup is set out in connecting a soundbar to an LG TV with an optical cable. If the optical link works but every light blinks orange, the bar is simply muted, as the first table showed.

What Do Red, Orange or Cycling Lights on an LG Soundbar Mean?

That orange blink is one of several codes in LG’s S95TR owner’s manual. On the S95TR, LED1 blinking red marks the power going on or off, and every light blinking red means maximum volume.

The lights also change color with the level, green from 1 to 33, yellow to 66 and red to 99, so a red row means loud, not broken. Display models such as the S75QR, S95QR and Sound Suite H7 show MUTE, DEMO or RESET instead, and none of the LG manuals cited here lists a numeric error code.

Why Isn’t the LG Wireless Subwoofer Working?

The subwoofer has a light of its own, and LG’s row for a silent subwoofer starts there. On the wireless subwoofer, blinking green or solid red means it isn’t connected, per the S60T and S95TR manuals, and a green light means it is.

Their setup pages add that red can also mean standby and an unlit LED means the power cable isn’t connected. LG wants the bar and subwoofer close together, off metal furniture, with nothing between them and at least 1 meter (3.3 feet) from wireless routers and microwave ovens.

If the light stays red, how to pair an LG soundbar to a subwoofer covers re-pairing. The S95TR’s wireless rear speakers use the same LED colors, and LG wants them at least 30 cm (about 12 inches) from the TV.

Why Is the Sound Out of Sync on an LG Soundbar?

Once every speaker is connected, timing is next. When the sound is out of sync on an LG soundbar, LG’s webOS 25 guide separates two cases: if only some channels drift, the broadcaster’s signal may be the cause, and if all of them do, the fix is Match Screen and Sound under Sound > Advanced Settings.

A higher Match Screen and Sound value delays the voice more, and the options vary by Sound Out setting. Its Bypass option adds no delay, which LG warns can put the audio ahead of the picture.

With Game Optimizer on, the guide says audio delays may occur when Sound Out is a Bluetooth, optical or HDMI(ARC) device, and it suggests Use TV Speaker or Select HDMI Input Audio Format set to PCM. Over Bluetooth, LG warns that, depending on the device, video and audio can fall out of sync, and it recommends a wired connection if problems continue.

Some older LG bars carry the adjustment on the bar: the LAS551H manual’s AV SYNC button sets a delay from 0 to 300 ms for sound from the TV. On another maker’s TV the control has another name, and fixing soundbar delay on other TV brands lists each one.

Why Does an LG Soundbar Sound Thin, Muffled or Crackly?

Even with the timing right, the sound itself can still be off. For a thin, muffled or crackly LG soundbar, LG’s documents point to settings: the subwoofer’s connection and level, the voice mode, and where a Bluetooth device sits.

Thin sound starts with the subwoofer light from earlier. On the S95TR, Sound Tuning then sets the subwoofer from -15 to 6 and the center channel from -6 to 6, levels the LG ThinQ app also adjusts, and LG notes the subwoofer and rear levels apply only while those speakers are connected.

For voices that get lost, the S95TR’s Sound Effects button includes CLEAR VOICE PRO, which LG says improves the clarity of voices, and for a voice that resonates excessively, LG’s webOS 25 guide points to Sound > Select Mode on the TV. Crackling over Bluetooth gets the placement rules in the Bluetooth section below, and the guide adds that sound may stutter when the device is too far away, blocked, or near a microwave oven or wireless LAN.

Why Won’t the LG Soundbar Remote Work?

For a remote that does nothing, LG’s S95TR owner’s manual gives three causes: the remote isn’t aimed at the front of the bar, it’s more than 7 meters (23 feet) away, or its batteries need replacing (the S95TR’s remote takes AA batteries).

A soundbar remote lying face down on a coffee table with its battery cover off and two batteries beside it

If pressing Function doesn’t change the input and the lights just loop, demo mode may be on, and LG’s first fix is to unplug the bar and plug it back in. If the remote still fails, use your model’s exit:

  • S60T, S95TR, SC9S: hold Function on the bar for about 5 seconds.
  • S30A, S20A: volume to minimum on the bar, then hold Function about 5 seconds.
  • S75QR, S95QR (DEMO on the display): volume to 2, then hold Function about 5 seconds.
  • Sound Suite H7 (no unplug step): hold Source about 10 seconds, then Wi-Fi about 5 if DEMO stays.

If the volume acts up only with a Fire TV Stick remote, check the Firestick remote’s equipment control settings first.

Why Is My LG Soundbar Volume Low or Changing by Itself?

Once the remote answers, volume is the next row in LG’s tables, and the guide to why a soundbar can sound so quiet sets LG’s list beside other makers’. For a quiet bar, LG’s S95TR owner’s manual gives four fixes: turn DRC off in the app, change the TV’s Digital Sound Output from PCM to Auto or Bitstream, set a connected DVD or Blu-ray player’s Digital Sound Output to Primary Pass-Through or Bitstream with its own DRC off, and switch Night Time off.

DRC is under Sound settings > Sound output in the LG ThinQ app (S60T, S95TR, S30A) or Sound Settings in the LG Sound Bar app (S75QR, S95QR). On the TV setting, PCM hands the bar pre-decoded audio while bitstream sends the raw codec for the bar to decode.

Night Time lowers the general volume but raises soft sounds, so a bar left in it can seem to change level by itself. Turn it off with Settings, Left/Right to NIGHT TIME, then Up/Down.

While you’re in those menus, check the Sound Tuning levels too, since the best LG soundbar settings for each goal start every level at 0.

If the level jumps between channels or keeps changing, LG’s webOS 25 guide points to Automatic Volume Adjustment under All Settings > Sound > Advanced Settings, set to On, though it applies only to the TV’s own speakers and LG soundbars that support TV Sound Mode Share.

Why Does My LG Soundbar Keep Turning Off or On by Itself?

Volume aside, an LG bar also turns itself off and on by design. All eight current LG manuals cited here say it turns off after 15 minutes without an input signal, to save power, so going dark in a long pause isn’t necessarily a fault.

Auto Power turns the bar on and off with the TV or an external device, and on the S60T, S30A and S75QR it works only over an optical cable. Toggle it with Settings, Left/Right to AUTO POWER, then Up/Down.

Over HDMI, SIMPLINK links the power instead. LG’s webOS 24 guide says turning the TV off can turn off SIMPLINK devices, and turning one on can wake the TV, depending on the model.

To set that link up from the start, the LG section of the walkthrough on getting an LG soundbar to turn on with the TV begins with the SIMPLINK switch and the Sound Out setting that turns it on by itself on 2025 sets.

If the bar won’t turn on, LG’s only listed check is the power cord in the outlet. A dark bar may simply be set that way, since with DISPLAY on Off the lights go out 20 seconds after the last button press.

How Do You Fix LG Soundbar Bluetooth Problems?

That Auto Power row names Bluetooth devices too. For a phone or TV that won’t pair, turn its Bluetooth off and on, clear any obstacles, and press the bar’s Bluetooth pair button, which keeps pairing open for three minutes on the S95QR, according to LG’s manual.

Older bars such as the SK5Y and SNH5 pair through Function until BT instead, and Burton Acoustix’s guide to LG Bluetooth pairing mode shows what each series displays while it waits.

If it pairs but drops out or crackles, keep the device near the bar, off walls, and at least 1 meter (3.3 feet) from routers, microwaves and medical equipment. Sound cutting out over HDMI or optical is covered in the guide to a soundbar that keeps cutting out.

For another brand’s TV, the pairing flow on Samsung, Vizio, and TCL TVs follows the same pattern as LG once both devices are in pairing mode. Wi-Fi bars that won’t join the network get router fixes in the S95TR and S95QR manuals, such as WPA2 and a password without special characters.

Should You Reset an LG Soundbar, and What Does It Clear?

Those network settings are what the reset in LG’s S95TR owner’s manual wipes: holding the Wi-Fi button on top until you hear a tone clears the bar’s wireless network settings.

A soundbar power cable unplugged and lying on the floor beside a wall outlet below a TV stand

All lights blink white on the S95TR and SC9S; then reconnect the bar in the LG ThinQ app (S95TR, H7) or LG Sound Bar app (SC9S, S95QR). The S95QR manual also prescribes the reset for a frozen bar.

The S60T, S20A, S30A and S75QR manuals list no reset at all. Their fix, the first row of every LG table, is to unplug the power cable and connected devices such as the TV, subwoofer or amplifier, then plug them back in.

Every LG line’s documented reset, from the Wi-Fi button to the Mic mute key on the SL10YG and SN11RG, is laid out by model in the guide on how to reset an LG sound bar.

For other brands, see the guide to rebooting or factory resetting a soundbar.

What If the LG Soundbar Still Won’t Work?

If the bar stays silent on every input after the unplug (and the Wi-Fi reset), LG’s tables have nothing left to try. Once the 15-minute auto-off is ruled out, distortion at any volume, a dead one channel, or random shutoff during normal use point to a failing bar worth taking to LG for repair.

An LG replacement keeps LG TV features such as WOW Orchestra, which the S60T runs over HDMI.

For other brands, see the LG-aligned soundbar picks ranked by Simplink, eARC, and WOW Orchestra integration.

The Bottom Line

LG’s tables blame settings before faults: mute, minimum volume, the wrong input, demo mode, DRC and Night Time. Rule those out, then unplug and reconnect, and keep the Wi-Fi reset for last.

When the bar has power but no TV sound, the connection comes next: the speaker output, SIMPLINK and eARC Support on HDMI, or the covers and a competing ARC cable on optical.

For sound modes, the LG standard vs cinema split shows which preset modes each tier offers, and the soundbar hub is the broader starting point.

Frequently Asked Questions

How do I reset my LG sound bar and subwoofer?

LG’s manuals give the bar and subwoofer no separate reset: unplug the bar and its connected devices, subwoofer included, then plug them back in. On Wi-Fi bars such as the S95TR, holding the Wi-Fi button also clears the network settings, and a subwoofer light that isn’t solid green afterward means pairing again.

Why is my LG soundbar blinking red?

On the S60T, S95TR, SC9S and S30A, LED1 blinking red marks the power turning on or off, and every light blinking red means maximum volume. A red light on the wireless subwoofer means it isn’t connected.

Can you reset an LG soundbar without the remote?

Yes. The Wi-Fi models reset with the Wi-Fi button on the bar itself, the demo-mode exits use the bar’s own buttons, and unplugging the power cable needs no remote.

Why does my LG soundbar keep cutting out?

LG’s documents name four causes, each covered above: a Bluetooth device too far from the bar, radio interference between the bar and its wireless subwoofer, the 15-minute auto-off when no input signal arrives, and, on an LG TV, the broadcaster’s signal when only some channels break up.