Hi Mariouzzi,

This is a stretch, but this might be related to a ground loop problem between your Wii, the PlayStation, your Denon and the Toshiba--ground loops can introduce video problems in addition to audio hum and buzz.

Try individually disconnecting the Wii power supply from the wall outlet, the PlayStation, the Denon and the Toshiba, to see if the problem disappears when one of those components is totally off, and the connection between it and the Denon is removed.

Also, why not let your Toshiba do the scaling/de-interlacing, bypassing that function in the Denon to see if that will remedy the problem.

Regards,
Alan

Alan Lofft,
Axiom Resident Expert (Retired)