Yes, I've got one, and it has FOUR (4) lights on the front panel, but only 2 are always on.....
1 says 'active' and the other LED says optical, even tho Im not using the optical port...
hope that helps
PS:I also got that really low hum, which I reckon is earthing too-- thanx for the tip, I'll do the insulation thingy rite now