Hello everyone, my first time posting....
but I wish I would have seen these posts before buying this humming 804
I spent ALL day from 9am to 1am replacing my 8 year old Sony AVR with this humming 804....I had it all done by noon, but spent the rest of the time setting it up and trying to get rid of the damn hum!
Ive got a Hughes HD D* receiver hooked up via Component and opti to the 804, a Sony dvp-ns90v hooked up via HDMI to the 804, then HDMI to the panny TH-50PX50U.
I get the hum in the sub no matter what source I use...but the DVD is slightly louder when paused, Im sure the D* is just as loud, but since there is no pause I cant hear is as bad until there is a quite part in the program.
The louder I turn up the volume on the 804, the louder the hum gets
Ive tried all different cable combos, different cables, different power outlets, you name it and nothing fixes it, BUT..................remove the HDMI cables from the system.....and the HUM is gone!
If I hook up my DVD via component and opti, and component to the Panny, all is good.
If I leave any one HDMI cable in the system at all, the hum comes back....
I tried getting away with leaving just the HDMI from the 804 to the Panny and the hum comes back.
I even unpluged the Panny power cord from the SP and the hum was still there.
I tried pluging in the HDMI's to the 804, but leaving them unpluged from the source, and there was no hum, but as soon as I even touch the HDMI to a source unit (DVD or TV) the hum comes back....even with the source units power unplugged from the SP!
So.....IMO something inside this 804 is wrong....there must be some kind of feedback, ground noise, or something in relation to the HDMI jacks and the analog pre-outs.
So right now I have no HDMI's in use and its all good with no hum at all, but what's the point of having a nice new AVR with HDMI if you cant even use them?
Its too bad, because the picture I was getting from using the HDMI cables was a little bit nicer too, but I cant stand that hum in the sub
Has any one contacted Onkyo about this problem?
I guess Im going to try and if all else fails, its going back in the box