ajay wrote:

I have a RCA ColorTrak 2000 TV. A few days back, one specific channel,
ESPN suddenly started using background sound of CNN. So now even if I
can see ESPN, the sound is of CNN channel.

Can anybody help me troubleshoot this?

Perhaps you can tell us the channel assignments of ESPN and CNN.
Any other channels having problems?
Is the cable going directly into the TV, or is it through a cable box?