My Bose tv speaker is not connecting with my Bose 700

Nice to meet you, *****!
What troubleshooting have you done so far?

I got it
Have you tried rebooting the connected device?

Okay
Reset the HDMI connection by resetting both devices and the cables connected between them.

1. Turn off the Bose system, the source device and the TV.
2. Unplug the Bose system, the source device and the TV.
3. Disconnect two HDMI cables at both ends and reseat them ensuring secure connections.
4. Reconnect the source device, the TV and the Bose system to power.
5. Turn on the TV and the source device.
6. Once the TV and source device have finished powering up, turn on the Bose system.

Take your time

Okay, got you

Noted
What is the model of your TV?

Thank you
In the settings menu of the connected device (i.e. cable box or Blu-ray player), look for audio settings. Many devices that send audio over HDMI might have an option for ARC or CEC; try enabling these. If the device connects to the TV and then to your Bose system, look for these settings in both the device and TV menus. (Note: CEC may be referred by a different name in the device menu - Anynet+)

Keep me updated

Okay, let's move on to the next solution
Have you tried to perform a hard reset of your TV?

Just to be sure, Check the volume level of the Bose system.
Be sure the system volume is not turned down.
Using the volume control, gradually increase the volume level.

Thank you

Could you try to increase the volume on your Bose Using the volume control?

Let us try to reset your soundbar
Power off the soundbar.
Disconnect the power cord from the soundbar or power outlet.
If an accessory bass module or surround speakers are connected, disconnect the power cords for them also.
Tip: If accessory surround speakers are connected, disconnect power from both surround speaker receivers.
After 30 seconds, reconnect power to the soundbar.
Wait about 30 seconds for the soundbar to reboot.
If you disconnected power cords from an accessory bass module or surround speakers in step 3, reconnect them.

Please, keep me posted

Could you try to connect your Bose 700 to your TV, one more time?