What can cause noise with my Wadia 381? HELP

My new Wadia 381 CD player (modified by a well known company in Minnesota) has exhibited a reproducible noise problem since it was new. There is a ridiculously high noise floor that sounds like hiss, louder in the left channel. But ALSO, there is static noise that sounds much like scratches on a vinyl disc that are NOT constant but recur with regularity. I can e-mail a QuickTime video to anyone who is interested that demonstrates the noises quite clearly. Just to rule out various causes, I have swapped out interconnects, amplifiers (solid state and tube), and speaker systems. In addition, I took the Wadia to a different house with no cable TV, all appliances unplugged, all fluorescent lighting turned off and the NOISES ARE STILL THERE! I SENT THE 381 in for service and they claim that the unit functioned perfectly--no noise. I am at my wits end because a very expensive Wadia 381 with mods has a very reproducible set of noises that everybody on the planet that has been in my house can hear with any system equipment that I own. But I am getting nowhere with the dealer regarding this problem--I am told that the unit checks out and it is my problem. I fear that when I send the unit back in again for service for another $100 shipping, I will once again get the "no problem" diagnosis. The dealer had the unit running for hours and claim they NEVER HEARD A SINGLE NOISE. For whatever reason, the burden of proof of what is clearly a Wadia sourced issue seems to be placed squarely on my shoulders. Any input from the community will be appreciated.