RCA 31" TV pakes high pitched chirping noise

Question

I have a 31" RCA TV Model# F31665 (service # F31665 YX1) that makes a chirping noise when plugged in. I replaced the flyback and that did not solve the problem. I listened to where the noise was coming from and heard it near the power transformer. I replaced the transformer and still the same results. I have soldered some loose connections and nothing. What am I missing?