Best Buy Geek Squad policy on TVs HELP

[BLURAYSONYES]

Ok so my wife got me this 32" tv for valentine's day. shortly after 30 days I noticed something strange about the TV. Best Buy wouldnt take the TV back so they sent out a geek squad tech and replaced the mainboard inside. A week later similar problem came back. They came back to check it out and they couldnt figure out how they going to fix this. Its more likely the panel Id say. They said since its under the manufacture warranty its their decision to decide if I get it repaired or replaced. Does this sound right? I mean I purchased the extended warranty through best buy. I would assume since its only been 2 months after I bought it they would immediately replaced the tv with twice the defect. Whats your opinion or story you probably had with best buy in the past?