Polk Signa S2 No Sound: What Usually Causes It
If you are dealing with Polk Signa S2 no sound, the problem is usually not the soundbar itself.
In most cases, the issue comes from a TV audio setting, an HDMI ARC handshake problem, a muted source, or an incorrect input selection.
The Polk Signa S2 is a compact 2.1-channel soundbar with HDMI ARC, optical, and Bluetooth support, so there are several places where audio can break down.
The fastest fix is to isolate whether the issue is coming from the TV, the cable connection, or the soundbar input.
Check the Basics First
Before changing advanced settings, verify the simple items that commonly stop audio from reaching the soundbar.
- Make sure the soundbar is powered on and the LED indicators are lit.
- Confirm the volume is not muted on both the TV and the soundbar.
- Check that the correct input is selected on the Polk Signa S2.
- Test a different content source, such as live TV, a streaming app, or a Bluetooth device.
- Ensure all cables are seated firmly at both ends.
If the soundbar works with one source but not another, the hardware is probably fine and the problem is likely in the source device or audio output settings.
Confirm the Input Source on the Soundbar
The Polk Signa S2 can receive audio from HDMI ARC, optical, and Bluetooth.
If the soundbar is set to the wrong input, you may see power and volume activity without hearing anything.
How to verify the active input
- Use the remote to cycle through inputs until the soundbar matches the connected source.
- If you use HDMI ARC, select the HDMI ARC input on the soundbar.
- If you use optical, switch to the optical input.
- If you are streaming from a phone, tablet, or laptop, switch to Bluetooth mode.
Many no-audio complaints happen after a TV or soundbar was recently unplugged, moved, or reset, because the input mode no longer matches the connection type.
Fix HDMI ARC Connection Problems
HDMI ARC is one of the most common setups for the Polk Signa S2, but it can fail if the TV and soundbar do not properly communicate.
A bad ARC handshake can leave you with video and silence.
What to check on the TV
- Confirm the HDMI cable is connected to the TV’s HDMI ARC or eARC port.
- Make sure the TV audio output is set to external speakers, HDMI ARC, or receiver, depending on the menu wording.
- Enable HDMI-CEC if your TV requires it for ARC audio.
- Disable the TV’s internal speakers only if the TV does not automatically switch outputs.
Different brands label these settings differently.
Samsung may use Anynet+, LG uses Simplink, Sony uses BRAVIA Sync, and Vizio uses CEC or System Audio Control.
These are all part of the same control chain that helps ARC work correctly.
Power cycle the ARC connection
- Turn off the TV and soundbar.
- Unplug both devices from power for 60 seconds.
- Disconnect the HDMI cable, then reconnect it firmly.
- Power on the TV first, then the soundbar.
- Play audio again and check for sound.
This simple reset often restores HDMI ARC after a firmware update, power outage, or device reconnection.
Test the Optical Cable
If you are using optical audio, the cable and TV menu settings matter just as much as the connection itself.
Optical is reliable, but it will produce silence if the TV is sending an unsupported signal or the cable is not seated properly.
Optical troubleshooting checklist
- Make sure the optical cable is fully inserted into both the TV and the soundbar.
- Inspect the cable ends for dust, damage, or a bent protective cap.
- Set the TV audio output to PCM if Dolby Digital passthrough causes compatibility issues.
- Check that the TV is not still set to internal speakers.
On some TVs, the optical output can be disabled or set to a variable output that conflicts with external speaker control.
Switching the output format to PCM is a useful test because it removes decoding complexity from the equation.
Bluetooth Connected but No Audio?
If the Polk Signa S2 pairs with a phone or tablet but stays silent, the issue is often with playback routing rather than pairing.
Bluetooth can appear connected even when the wrong media output is selected on the source device.
What to check on the source device
- Make sure audio is playing in an app, not just paused in the background.
- Confirm the sound output is set to Polk Signa S2 in the Bluetooth or media output menu.
- Turn Bluetooth off and on again, then reconnect.
- Forget the device and pair it again if the connection is unstable.
Also check whether the phone is sending audio to a headset, smart speaker, or car system instead of the soundbar.
Many smartphones remember previously connected audio devices and route sound there automatically.
Review TV Audio Settings
TV audio menus can block external sound even when all cables are correct.
This is especially common on smart TVs with multiple audio formats and output options.
Settings worth verifying
- Digital audio output is set to PCM, Auto, or Bitstream depending on the soundbar compatibility.
- TV speakers are disabled or set to external audio.
- Volume leveling, night mode, or audio delay settings are not reducing output to near silence.
- Any headphone jack output is not overriding the main speaker output.
If your TV has an audio delay or lip-sync adjustment, return it to a neutral value while testing.
Extreme delay settings can make it seem like there is no sound when audio is actually out of sync or routed incorrectly.
Reset the Polk Signa S2
When settings checks do not work, a reset can clear temporary glitches in the soundbar’s input or amplifier behavior.
This is especially useful after a power interruption or HDMI device swap.
When to reset
- The soundbar shows power but no audio from any source.
- Input switching does not restore sound.
- Bluetooth pairing behaves normally, but playback is silent.
- The TV and soundbar used to work together, then stopped after a change.
After a reset, reconnect the soundbar carefully and test each source one at a time.
Start with the simplest connection, then move to the next source if audio returns.
Rule Out Cable and Port Damage
A faulty HDMI cable, damaged optical cable, or bad TV port can mimic a speaker failure.
Swapping components is the quickest way to identify the fault.
- Try a different HDMI cable that supports ARC.
- Use another HDMI port on the TV if the port supports ARC.
- Test a second optical cable if available.
- Inspect the soundbar’s ports for looseness or bent connectors.
If another device works through the same TV port, the port is likely fine and the original cable or setting is the problem.
If no external audio device works on that port, the TV may need service or a different output path.
When the Polk Signa S2 Still Has No Sound
If you have checked input selection, ARC, optical audio, Bluetooth routing, and TV settings, the issue may be deeper.
Possible causes include firmware bugs, internal amplifier failure, or a TV compatibility problem that requires a different connection method.
At that stage, compare the behavior across multiple sources:
- If all sources fail, the soundbar may need service.
- If only one connection fails, the issue is likely the cable or the source device.
- If the soundbar works on another TV, the original TV settings or ports are the likely cause.
For the most stable setup, many users get the best results by using one primary connection method, matching the TV audio format to the soundbar, and avoiding unnecessary switching between inputs.