A soundbar might solve your problem.
You will need to know if the audio output of the TV is working to be sure.
If the TV has a headphone jack then try that.
If the TV has optical audio output then you would need to turn it on. Check the TV manual on how to do that. A red light would be visible from the optical jack if its on.
If the audio out isn't working then you can connect a soundbar directly to your external sources. An HDMI input selector with audio extraction might help you to do that with multiple sources.