Troubleshooting
TV has no sound? Why it happens and how to fix it
Nefarius Apps11 min read
A TV with a perfect picture and no sound is usually muted or turned down. It can also use the wrong speaker output, or a loose cable or wrong input can block sound. Work in order from the cheapest check to the strongest fix. Unmute and raise volume on the TV and on every attached box. Switch sound output back to the TV speakers. Confirm the fault follows the TV across apps and inputs. Then reseat the cables, power-reset everything, and run the built-in sound test. Check PCM and signal format, update, and reset sound before the TV. A silent built-in sound test, or a fault that persists across devices, means the TV needs service.
This guide covers the checks in that order. It uses the brand paths from Samsung, LG and Sony and the checks Asurion confirms. Where the plastic remote is missing or dead, a phone does the volume and menu steps.
Start with mute and volume on everything
Start with the cheapest cause: mute and volume. A set-top box, soundbar or game console has its own volume and its own mute, and any one of them silences the whole chain.
- Press volume up on the TV remote and watch for the volume bar.
- Press the mute button once and watch whether a muted icon clears.
- Raise volume on the set-top box remote and on the soundbar remote as well.
- If the TV remote is missing or dead, use a phone instead. Change the TV volume without a remote shows the button, app and phone paths for each situation.
When the volume bar moves but no sound comes out, the fault sits past the volume stage: speaker output, source, cable or setting. Sony puts the TV mute button and the box volume among its first no-sound checks, so confirm both before moving on.
A TV that mutes itself again after every unmute behaves differently from a TV that stays silent. That lock is a separate fault from general silence.
Check which speaker the TV uses
A TV remembers its last speaker output. Unplug a soundbar or switch off a Bluetooth speaker and the TV keeps sending sound there. The room stays silent though nothing looks muted. Check this right after mute.
| Output setting | What you hear | What to do |
|---|---|---|
| TV speakers | Sound from the TV | Keep this while testing |
| Soundbar or AV receiver | Sound from the bar only | Switch the bar on, select its correct source, or switch output back to the TV |
| Bluetooth headphones or speaker | Sound in the headphones only | Disconnect Bluetooth or switch output back to the TV |
| Optical or HDMI ARC | Sound through the cable only | Check the cable and the bar input, or switch output back to the TV |
Set output back to the internal speakers for the test. Samsung describes the same step as choosing TV Speaker under Sound Output in its no-sound guide, and LG as choosing TV Speaker under Sound Out. Menu names move between model years, so search settings for Sound Output when the path differs.
On a soundbar, select the input the TV uses and allow about five seconds after switching. Samsung notes the source delay and OUT-to-IN wiring in its soundbar guide.
Two signs point to this cause. If the numbers on the volume bar do not change while you press volume, output points at an external device. If sound returns the moment you pick TV speakers, the TV side is fine and the bar, cable or Bluetooth pairing was the fault.
Find out whether one source or the whole TV is silent
Before touching cables, learn whether the fault belongs to one source or to the TV. The answer sets what comes next.
- Open another app on the TV itself and play anything with sound.
- Switch to live TV or another channel and listen.
- Switch to another input with another device and listen.
When one app or channel is silent and the rest have sound, the TV is fine. Asurion recommends checking another app or input first for exactly this reason. When one app is silent but others play sound, the TV is probably not the problem. Check that app or channel first: its own volume, its audio track, and whether the broadcast carries sound. When every source is silent, continue with cables and settings below.
Reseat cables and confirm the input
Loose and damaged HDMI connections cause dropouts and full silence. The fix is mechanical: firm connections at both ends, a known-good cable, the correct input, and a second port as the tie-breaker.
- Push the HDMI plug firmly into the TV and into the source device.
- Unplug both ends and plug them back in. Samsung covers reconnection, a new cable and another port in its low-or-no-audio guide.
- Confirm the TV input matches the port the device uses. Sony lists correct input selection among its checks. Change the input on a TV without a remote shows how to reach the input list with buttons, a phone or a keyboard.
- Try another HDMI cable when one is available.
- Move the device to another HDMI port and switch input to match. When sound returns on the second port but not the first, that port is suspect and the TV needs service.
| Pattern | Likely cause | Next step |
|---|---|---|
| One app silent, rest fine | That app or broadcast | Check the app volume and audio track |
| One input silent, rest fine | That device, cable or port | Reseat, swap cable, try another port |
| All inputs silent, sound test plays | Setting or output routing | Continue with sound test and format checks |
| All inputs silent, sound test silent | TV speakers or board | Seek service |
A cable fault that affects one port only still needs service even when the workaround works. Note which port failed before calling support.
Power-reset the TV and its devices
A power reset clears transient states that survive a normal standby cycle. Do it for the TV and for each device in the chain, not for the TV alone.
- Turn the TV off with its remote or its buttons.
- Unplug the TV power cord from the outlet and leave it unplugged for at least 60 seconds. Sony prescribes the same 60-second power reset for the TV and repeats it for the box and sound system.
- Unplug the set-top box and the sound system for the same time.
- Plug everything back in and switch on.
On Samsung sets a cold boot does the same without reaching the outlet. With the TV on, hold the Power button until the set switches off and back on, as Samsung describes. On LG sets a hard reset variant works: disconnect power, hold the physical Power button on the set for about 10 seconds, reconnect, switch on, as LG describes.
Power resets keep channels, logins and picture settings. They erase nothing.
Run the built-in sound test
The sound test plays through the TV speakers, so its result separates TV-side failure from everything past the TV. Run it after the power reset, not before, so a transient fault does not send a working TV to service.
On Samsung sets the path runs through All Settings, Support, Device Care, Self Diagnosis and Sound Test, as Samsung documents. On LG sets it runs through Support and Sound Self-diagnosis, with an OLED Care branch on some model years, as LG documents. Follow the on-screen melody check and answer honestly. When the plastic remote is missing, reach the sound menus without a remote first.
| Result | Meaning | Next step |
|---|---|---|
| Melody plays clearly | TV speakers work | Continue with format, update and reset steps |
| Melody distorted or absent | TV-side fault | Stop here and request service |
The test exercises the TV, not the attached box. A passing test with a silent cable box still leaves the box, its cable and its settings as suspects.
Check audio format and sound settings
A wrong digital format silences external devices and some bars while the TV menus look normal. Two settings cause most of it.
First, check the source device output. A Blu-ray player, box or console can offer Dolby Digital or DTS. When the TV or bar cannot decode that stream, switch the source to PCM or stereo. Sony recommends exactly this PCM or 2-channel fallback. Keep the change when sound returns.
Second, check the HDMI signal format on the TV port the device uses. Enhanced mode suits newer video paths; when audio fails on that port, Standard mode is the conservative test. Change it per port, not globally, and retest the same source before changing anything else.
Also reset the sound settings when they have drifted. The sound menu holds a reset choice. It returns balance, equalizer, format and output to defaults and keeps everything else, as Samsung documents.
Check headphones next. Anything plugged into the headphone jack, and any paired Bluetooth audio device, takes the sound. Asurion flags the forgotten Bluetooth connection as a fast check. Unplug wired headphones and disconnect Bluetooth, then retest with TV speakers selected.
A voice reading menus is narration rather than silence: audio description or a screen reader talking over a working soundtrack needs a different fix from this guide.
Update the software
Outdated firmware causes audio faults after updates and after long gaps without updates. Check the TV first, then the external device.
- Open Support or About on the TV and look for Software Update, as Samsung describes.
- Install any pending TV update and let the set restart.
- Check the box, console or soundbar for its own update per its manual.
An update check matters most when silence started right after a previous update. Otherwise treat it as one step in order, not the first suspect.
Reset sound, then reset the TV
Two resets remain, in strength order. Neither is a first step.
Reset sound settings first. It returns balance, equalizer, format and output choices to defaults and keeps everything else. Use the reset inside the sound menu described above.
Reset the TV to factory defaults only when every step above failed, or when support asks for it. A factory reset erases channels, logins, apps and picture settings. On Samsung sets the path runs through General and Reset, as Samsung documents. Write down accounts and Wi-Fi details before confirming.
When the TV needs service
Stop and seek service when any of these holds: the built-in sound test itself has no sound; sound fails identically with another device on another port with another cable; one HDMI port fails while others work; or the set shows a hardware symptom such as a dead backlight. Samsung gives the same stop rule. When the sound test fails or the fault survives another device, request service. Note the test result, the ports tried and the cables swapped before calling. A set under warranty should go to the maker rather than to a general repair shop.
The short version
Unmute and raise volume on the TV and on every box, then switch sound output back to the TV speakers. Check another app and input to learn whether the fault is one source or the whole TV. Then reseat cables, try another port, and power-reset everything for a full minute. Run the built-in sound test. Check PCM and signal format, update, and reset sound before the TV. A failed sound test or a fault that survives new devices and cables means service. The rest of the troubleshooting guides cover the failures that come after this one, and how to use an iPhone as a TV remote covers the groundwork that applies on every brand.
Common questions
Why does my TV have no sound even though it is not muted?
Because mute is only one of several silence paths. Check speaker output next: the TV may send sound to a soundbar or Bluetooth device that is off or gone. Then check source, cables and settings in the order above.
Why do some apps have sound and others do not?
Because the fault sits with the silent app, channel or broadcast rather than the TV. Check that app volume and audio track, try another title on the same app, and confirm other apps still play before touching cables.
My soundbar worked yesterday and is silent today. What changed?
Usually the TV output, the bar source or the cable seating. Confirm sound output points at the bar, set the bar to the input the TV uses, allow a few seconds after switching, reseat both cable ends, and test TV speakers alone to learn whether the bar path is at fault.
The volume bar does not appear when I press volume. What does that mean?
It often means output points at an external device the TV cannot drive with its own volume step. Switch output back to the TV speakers and press volume again. When the bar returns, the TV side is fine.
Why did sound disappear after a power outage?
Because the outage reset output, input or device states. Check input first, then speaker output, then power-reset the TV and each device for a full minute before changing settings.
Can my phone fix a TV with no sound?
A phone replaces a missing or dead remote for the volume, mute and menu steps on Samsung, LG and Android TV or Google TV sets. It cannot fix cables, ports, speakers or settings the TV itself must apply.
Sources
- Samsung (2026). Samsung TV has very low or no audio.
- Samsung (2023). Resolve the No Sound issue on your Samsung Smart TV.
- Sony (2026). No sound from the source device when connected to the TV with an HDMI cable.
- LG (2026). What to check if your LG TV has no sound.
- LG (2026). Troubleshooting an LG TV with no picture and no sound.
- Samsung (2026). No sound from Samsung soundbar.
- Samsung (2026). What to do when the TV has no sound.
- Asurion (2026). How to fix a TV with no sound.