Getting bad video passing to 5080

I have a base-level Onkyo TX-SR304 hooked up to my Pio 5080. On my prior TV (which had two component inputs on the back), I used to plug both my Wii and Xbox directly into the TV, and the audio to the receiver.

Now, since the 5080 only has one component on the back (and one on the side), I decided to pass the video through my receiver, which has 3 component INs and one OUT.

When all was said and done, I was really dissapointed to see that the video quality was just horrible. The on-screen image is completely covered in what looks like slight static. The colors are not as rich. And it looks like there is just pixels jumping around all over the screen - like the screen is sizzling - almost like an old tv that is getting poor reception.

I tried plugging the wii, xbox, and receiver into the same power strip. I tried swapping with nicer cables. But neither worked.

Can anyone give me any bit of advice as to what I'm doing wrong here? Is the reciever just crappy? Do I need to put the TV or the reciever or other components into some special power strip (perhaps one that minimizes interference)? (If there is such a thing, I am completely unaware of it).

Thanks for any help.

bmp

bump.

Anybody? Can anyone confirm or deny that this may be a problem with my power source? Or can someone at least tell me to shut up and get a new receiver? Anything. I'm feeling left out.