if we are talking about a known defect, (i can't say myself if it is known) then RCA should be confronted and they should fix it for free. Try posting this story on "the ripoff report" website. RCA may offer to take care of it to save a good customer the trouble.
if that does not work I would also try filing a BBB complaint and insist that they fix a potential known defect at no charge.
If you get stuck paying for it, you need to consider how much did this unit cost in the first place?? is it really worth fixing??
and if it is fixed, will the same problem occur again later on?