Can anybody help,I have a sony str-db930 av amp,the problem is when the display is on it creates a enourmous hum (I've been told It's 22 cycle hum??)through my speakers and changes in volume when you decrease the brightness of the display, the only answers I get is it must be cheap cables or dirty connections(which neither I have) but surely this would hum all the time if this was the problem? it only happens when the display is on.The amp is situated within about a metre of the tv (a 29" sony) and the manual states that the connecting cords have to be 5 metres away from a tv display but for me that's impossibility,do any other owners have the same problem?? let me know if you do then I at least know that it's my amp can you help????? it's driving be mad....thanks bayfjord.