I have an Integra DTR 6.4. I came across a forum that mentions a "ticking problem" after I bought it. I had one incident of a strange digital feedback noise that I believe was caused by a faulty connection. Since setting up in my new house (for about two weeks now) I haven't had that issue. However, I do notice, every once in a while, a random noise, a kind of "spak" sound that seems to emanate from the receiver itself. Not the speakers. It sounds a lot like a TV sometimes does when you shut it down and it's "cooling off". It's not loud, it's only one "tick" at a time--not a series--and it doesn't come from a speaker, but rather the receiver itself. I did notice that the power cord doesn't slot in as tightly in back of the receiver as other cords do in my sub and DVD player, for example. Could an imperfect connection at the power cord cause this intermittent noise? Could this be the "infamous" ticking noise often mentioned regarding Onkyo/Integra receivers in various threads across websites? Has anyone noticed this before? Is it normal? (My old receiver was in an enclosed cabinet and may have been making the same kind of noise, but I wouldn't have heard it.) Any comments would be appreciated as I'd like to use the system without getting paranoid about little noises. P.S., I've checked all my connections and, except for the noted looseness at the power cord (very slight), all connections are proper.