JBL Bar 700 No Sound: What Usually Causes It
If your JBL Bar 700 no sound problem appeared suddenly, the issue is often a simple connection, input, or TV audio setting rather than a hardware failure.
The JBL Bar 700 is a multi-channel soundbar with an external subwoofer, HDMI eARC support, and wireless streaming features, so several parts of the audio chain can interrupt playback.
In many cases, the soundbar is powered on and connected, but audio is being routed somewhere else or blocked by a format mismatch.
Understanding where the signal breaks makes troubleshooting faster.
Check the Basics First
Start with the simplest checks before changing advanced settings.
These quick steps resolve a large share of no-audio problems on soundbars from JBL, Samsung, Sonos, Sony, and LG.
- Confirm the soundbar is powered on and not in standby.
- Raise the volume on both the JBL Bar 700 and the TV remote.
- Verify the soundbar is set to the correct input source.
- Make sure the TV is not muted.
- Disconnect headphones or other audio devices from the TV.
Also check whether the JBL app shows the system as connected.
If the app is unavailable or the device is offline, the issue may be with the wireless link or the initial setup.
Verify the HDMI eARC Connection
The JBL Bar 700 is designed to work best with HDMI eARC or ARC from a television.
A loose cable, wrong port, or incorrect TV audio setting can result in no sound even when the soundbar appears to be working.
What to inspect
- Use the HDMI cable included with the soundbar or a certified high-speed HDMI cable.
- Connect the soundbar to the TV’s HDMI port labeled ARC or eARC.
- Confirm the TV input is not set to the soundbar’s HDMI pass-through port by mistake.
- Remove and firmly reseat both cable ends.
If possible, test another HDMI cable.
Faulty cables are common, especially with longer runs or worn connectors.
A damaged cable can pass video through a set-top box or console but fail to carry audio return from the TV.
Check TV Audio Output Settings
Many JBL Bar 700 no sound complaints come from a TV still sending audio to its internal speakers or using a format the soundbar does not handle correctly.
This is especially common after a firmware update, power outage, or factory reset.
Settings to review on your TV
- Set audio output to HDMI ARC, eARC, or external speaker.
- Turn off TV speakers if that option exists.
- Set digital audio output to Auto, Bitstream, or Pass Through when supported.
- Disable advanced audio processing modes temporarily.
Some televisions, including models from Samsung, Sony, TCL, Hisense, and LG, may default back to internal speakers after a reset.
Re-selecting HDMI ARC or eARC often restores sound immediately.
Confirm the Correct Source on the JBL Bar 700
The JBL Bar 700 can receive audio from TV ARC, Bluetooth, and other inputs depending on setup.
If the wrong source is active, the system may seem dead even though it is functioning properly.
- Press the source button on the remote and cycle through available inputs.
- Check the display or indicators for HDMI ARC, Bluetooth, or optical mode.
- If using Bluetooth, confirm your phone or tablet is actually connected and playing audio.
For Bluetooth playback, remember that many phones pause audio when another app or device claims the connection.
Reconnect from the Bluetooth menu and retry with a streaming app such as Spotify, YouTube Music, or Apple Music.
Restart the Soundbar and TV
A full power cycle can clear handshake errors between the TV and soundbar.
HDMI ARC depends on device communication, and that communication can fail after sleep mode or a software glitch.
How to power cycle properly
- Turn off the TV and soundbar.
- Unplug both devices from power.
- Wait at least 60 seconds.
- Reconnect power and turn on the TV first, then the JBL Bar 700.
This order helps the TV recognize the soundbar during startup.
If the problem returns after standby, the issue may be an ARC handshake bug or a CEC control conflict.
Review HDMI-CEC and Device Control Features
HDMI-CEC allows devices to control each other over HDMI.
On TVs, it may appear as Anynet+, Bravia Sync, Simplink, VIERA Link, or a similar name.
While useful, CEC can also interfere with audio routing.
If sound disappears after changing inputs or waking the TV, try these steps:
- Disable CEC temporarily on the TV.
- Power cycle both devices.
- Re-enable CEC and test again.
In some setups, CEC must be enabled for ARC audio to work.
If so, the goal is not to leave it off permanently, but to reset the handshake and eliminate conflicting control commands.
Update Firmware on the JBL Bar 700 and TV
Firmware bugs can affect audio decoding, HDMI compatibility, and wireless stability.
JBL periodically releases updates through the app or connected network features, while TV manufacturers also publish software fixes that improve ARC and eARC behavior.
Why updates matter
- They can fix audio dropouts and handshake issues.
- They may improve Dolby Atmos and PCM compatibility.
- They can resolve Bluetooth pairing errors.
Check the JBL app for available updates and review your TV’s system menu for current software status.
After updating, restart both devices and test sound again with a known source such as a built-in TV app or an external streaming device.
Test Different Audio Formats
If the JBL Bar 700 produces no sound only with certain apps or sources, the issue may involve audio format compatibility.
Some TVs output Dolby Digital, Dolby Digital Plus, PCM, or pass-through formats depending on the content and device.
Try switching the TV’s digital audio output to another supported option.
If the TV is set to a format the soundbar or connected source does not handle cleanly, audio may fail or remain silent.
- Use PCM for a simple compatibility test.
- Try Auto or Bitstream if PCM does not help.
- Check whether the issue affects all content or only Dolby Atmos titles.
If one app works and another does not, the problem is likely not the soundbar hardware.
Streaming app settings, DRM restrictions, or the TV’s audio pipeline may be the cause.
Inspect Optical Audio if You Are Not Using HDMI
Some users connect the JBL Bar 700 with optical audio instead of HDMI ARC.
Optical can work reliably, but it does not support every feature available through HDMI, including CEC-based control and some advanced surround formats.
For optical troubleshooting, confirm that:
- The optical cable is fully inserted at both ends.
- The TV audio output is set to optical or external speaker.
- The cable tips are clean and undamaged.
- The TV is not simultaneously sending audio to internal speakers.
Optical cables are sensitive to misalignment.
A slightly loose connector can still look seated while blocking the light signal needed for audio.
Reset the JBL Bar 700 if Nothing Else Works
If all settings and cables check out, a factory reset may clear a hidden configuration problem.
This is useful after moving the soundbar to a new TV, changing routers, or recovering from repeated pairing failures.
Before resetting, note your preferred settings and ensure the JBL app is ready for re-setup.
After the reset, reconnect the soundbar to the TV and retest audio from a simple source.
If the bar still has no sound after a reset, the issue may be deeper, such as a damaged HDMI port, faulty power supply, or speaker module failure.
At that point, testing the soundbar on another TV is the best way to isolate whether the problem is with the JBL unit or the television.
When to Contact Support
Reach out to JBL support or your retailer if the soundbar remains silent after cable swaps, settings checks, firmware updates, and a factory reset.
Provide details about the TV brand, model, connection type, and whether the issue affects HDMI ARC, Bluetooth, or all inputs.
Useful information to collect includes:
- TV model and firmware version
- Soundbar firmware version
- Connection method: HDMI ARC, eARC, optical, or Bluetooth
- Whether the subwoofer and rear channels are active
- Whether any sound plays from the TV speakers
This information helps support teams determine whether the problem is a setup issue, a compatibility issue, or a hardware fault.
Prevent Future JBL Bar 700 No Sound Problems
Once audio is restored, a few habits can reduce the chance of the issue returning.
Keep firmware current, use high-quality HDMI cables, and avoid frequent unplugging of the TV and soundbar when unnecessary.
If you switch devices often, leave HDMI-CEC enabled only if it remains stable in your setup.
It also helps to remember that ARC and eARC performance depends on both the TV and soundbar.
Even a capable soundbar like the JBL Bar 700 can have silent playback if the television’s audio output, control settings, or firmware are misconfigured.