Hi there and welcome
Can you tell me the make and model of the device with the issue please?
Can you please remove the power to the TV (so unplug it from the power socket).
Then on the actual TV, hold the power button for 60 seconds then release.
Then wait 10 minutes, connect the power again to the TV, turn it on and tell me please if it is now operating correctly.
Let me know the results please
What is the TV connecting to for it's picture? An Antenna? A set top box like Sky?
yes I saw, but I need to know Joan
I can call if easier?
Do you have a DVD player or some other recorder connected to the TV?
ok, if you switch to that device and play it through the TV, do you then get sound?
ok, on the TV, go to Settings, Setup, Reset to Default
Complete this, set up the TV again and tell me please if you then get sound