HELP! Dead Nav/Radio with Hum

[Candlemuse]

I think you are taking the best option , by opening the console and checking the connections. I would also take out all the cables and connectors which came with the USASpec adapter , and connect the OEM connectors to the
head unit. Unless there is something visibly wrong with the cables or connectors.Otherwise the head unit should work. Just to update you I received the Peripheral, PXGM24 V2 today , and installed it. It works . It is probably too soon to say anything good or bad about it , because the USASpec adapter that I took out worked for couple of weeks before starting to cause problems.
But what was a major concern for me from day one was that the USASpec adapter displayed the XM 1 and XM2 before switching to CD changer input
to be used for the iPod. the reason I need 2 inputs is that I need an input
for the iPod and an Input for the satellite phone.
I hope to hear from you , to see how is every thing going with the problem.