2 days ago I purchased some gold tip component cables for my sling350. All was perfect with the cables that came with sling except for the occasional audio/video drop. After installing the new cables I hear a disturbing hum and video quality sucks. I even put the old cables back I place and the same problem is occurring. Am I missing something but did an attempt to upgrade my signal quality destroy the sling? I am at a total loss.
I can't think of any reason why a cable swap would impact the Slingbox or signal. Did you change anything else in the setup? New set top box etc.? I'd recommend a reset to factory settings just to make sure your setup is complete. This article Restoring your Slingbox to factory settings explains this process.