If you connect a speaker to the BenQ TK700STi projector, but there is no sound that can be heard. You can try the following solutions for troubleshooting.

  • Check whether the HDMI cable supports ARC/eARC. Try to use an HDMI cable with ARC or eARC.
  • Check whether the HDMI interface that you are using supports ARC/eARC or not, and change the HDMI cable to the other port with ARC/eARC feature.
  • Check whether the ARC/eARC is enabled or not on the projector and your device.
  • Check whether the audio format is supported by the BenQ TK700STi projector or not.
  • Check whether the cable is well connected.

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