How can I fix my hum problem?\n\nI have a decent idea of what is causing my hum problem but am not sure of a way to fix it.\r\n\r\nMy electrical devices: A computer which has all my music on it, with a 3-prong plug. The monitor also has a 3-prong plug. *All my other equipments only have 2-prong plugs.* My receiver, computer, and monitor are plugged into the same power strip. There is no hum on my receiver.\r\n\r\nI have a SECOND receiver plugged into a different power socket. This is part of a different setup, for the TV. It is located about 12-feet from my computer. Again, all equipment besides the computer have 2-prong plugs. There is no hum on this system.\r\n\r\nI ran line-level cables from my first receiver to my second, because I may want to play my computer's songs from a different location, through different speakers. Or I may want to play songs through many speakers at once (fake surround sound haha). However there is terrible hum on this system due to a ground loop problem originating from my 3-pronged computer. So I can't hook up both my receivers to my computer. :(\r\n\r\nThis problem goes away if I simply plug my second receiver into the same power strip as my computer, I have tried it. Furthermore my TV, DVD player, and other devices can all be plugged anywhere and no hum will result. Only the computer source is having hum problems. Unfortunately due to my setup (TV and computer on opposite sides of room) the power cords are not long enough to all plug into the same power strip (I only managed to do so for testing purposes, not when I have my equipment where I want them to be at). What can I do?\r\n\r\nFirst of all I am confused because there is only one 3-pronged device in this entire setup...the computer. Don't there need to be two 3-pronged devices to cause a ground loop hum?\r\n\r\nThe easiest solution seems to be to get a power extension cable. I did, and thus extended my second receiver's power cord and plugged it into the same power strip as my computer. Unfortunately this power extension cable had 3-prongs on it and the hum did not go away. Would this work if I got a 2-pronged extension cable? Also I am worried because all the receiver manuals say "DON'T USE AN EXTENSION CORD WITH THIS PRODUCT"...why is that? Is it dangerous for me to do so? Thanks in advance for any help I might get.