When the TCL Q7 has a picture but no sound, the problem sits in the TV's sound output setting, the source's audio format or the speakers or external devices connected to it. Start by pressing volume up and checking that the TV is not muted, then open Settings, Display and Sound, Sound, and look at the Speakers option: it must be set to TV speakers, or to the correct external device, not to an optical or Bluetooth output that is not connected. Many cases of no sound come from a TV that thinks a soundbar is connected.
The checks in more detail
Check the digital output format: if it is set to Dolby or Auto and the connected device cannot handle it, switch the format to PCM or Stereo to test. On a Google TV, Settings, Remotes and accessories lists Bluetooth speakers or headphones that may have grabbed the audio, so disconnect them. If the sound is missing only on an HDMI source such as a console or streaming stick, set the source to output PCM stereo or lower the surround setting, and try another HDMI port and cable.
For a soundbar on the eARC port, turn on HDMI-CEC control and eARC in the TV settings, and set the soundbar to the HDMI ARC input; if it still fails, power both off and unplug for a minute. If the TV speakers are silent only in one app, check the app's own audio setting and update it. Do a power cycle: unplug the TV for a minute, plug it back, and test. Run an update in Settings, System, About, System update. If the sound works through headphones or a soundbar but not through the TV speakers, a speaker or board fault is possible and TCL support can help.
A reset of the sound settings or a factory reset after a backup is the last resort before repair. If the problem began after a software update, check whether the TV reset its sound output to a device that is not there, which an update sometimes does after a new input is added. Also test with a different source, such as the TV's built-in apps and an antenna channel, to confirm whether the fault is the TV's output and not a single source. Record which sources are silent and which are not, because that single fact narrows the cause faster than any setting.
Differential
Likely causes of “TCL Q7 QLED Google TV has picture but no sound”, and how to tell them apart
- 1
The output is set to an absent device
What separates it The TV is silent
How to confirm Choose TV speakers
- 2
A digital format the device cannot play
What separates it Silence from an external source
How to confirm Use PCM or Stereo
- 3
A Bluetooth device took the audio
What separates it No sound from speakers
How to confirm Disconnect Bluetooth devices
- 4
eARC or CEC set up wrongly
What separates it No sound from a soundbar
How to confirm Enable eARC and CEC, check the ARC input
- 5
A hardware fault
What separates it Silent on every setting
How to confirm Contact TCL
Before you touch a setting
Record this first — changing settings destroys the evidence
- The sound output setting
- The source of the silence
- Whether a soundbar is connected
- The digital format
Try in this order
0 of 6 completedCheck mute and volume
ReversibleOn the TV.
Select TV speakers
ReversibleIn Sound settings.
Set the format to PCM
ReversibleTo test.
Disconnect Bluetooth devices
ReversibleIn Remotes and accessories.
Check eARC and CEC
ReversibleFor a soundbar.
Power cycle and update
ReversibleThe TV.
Model-specific
What is true of this model and not of its siblings
- Output setting
- The TV may think a soundbar is attached.
- PCM
- The safest digital format.
Stop boundary
When this stops being a self-service repair
- !If the TV speakers are silent on every setting, contact TCL
- !If only a soundbar fails, check eARC and CEC
- !Update the TV
Evidence ledger
Sources behind this answer
Exact questions
Common questions
Why is there no sound on my TCL Q7?+
The output setting or a connected device.
What format should I try?+
PCM or Stereo.
Can Bluetooth take the sound?+
Yes.
What if only the speakers are silent?+
Contact TCL.