Unless you are a qualified r.c.a. technision. forget it This problem seems like you need a pro good luck
I have a RCA model p52921 big screen tv.
The sound gradually fades out until eventually there is only the sound of white noise.
The next day, after the TV sits for about 5 hours, the sound is fine when I wake up. I have a friend that's willing to help me open it up to fix it if I
can get a good idea of what's wrong, and what to do.