I have the same set (the Costco kdl-40vl130 version) and it does the same thing. The owners manual does make mention of this noise on page 5 or so. This is actually my third sample of this model. I returned the second set because I thought the popping was a sample defect. The first one was returned due to intermittent sound. That issue, however, appears to have been cable-related. The strange thing was that those times I turned on the Sony and it was silent, switching inputs did not bring the sound back. After the sound began breaking up with the third and current set, I had the cable guy came out. He moved the Sony off of a cable amplifer, saying that signal output was too high. Sounds fishy to me but I haven't lost sound since he did that. I don't recall the clicking and popping noises with that first sample but it could be that I wasn't paying attention. It was a while ago. I have occasionally noticed the noise for a minute or two after powering up, as well. It appears to be metal and plastic heating up and cooling down. It does not appear to be a sign of impending failure and I have seen postings about this type of noise with other brands in avsforum.com.
Help! I have a new Sony kdl-40v3000 and would like to know if it is normal for it to make clicking/crackling noises after powering off? It lasts for about one to two minutes. I had returned my the first one I purchased after ten days, but now this one is doing the same thing. It only makes the noise when it is powered off and it lasts for about one to two minutes. I hope someone has answers for me. Thanks. Marina