Hi everybody. Today I experienced a lovely upgrade from an iMac G4 to the new 3.06. Basically: Yay. The big problem facing me right now has to do with electricity. I'm no electrician and so I have no idea how any of this works, but here goes. When the new iMac's display goes to sleep, it emits a short buzzing sound from somewhere around the top-left corner, approximately every two seconds. The lights in the room flicker during this. This house was built somewhere around 1970 and I have no knowledge of the electrical wiring ever having been changed (but I don't really know as I've only been here seventeen years). In the winter, when the furnace kicks in, usually some light can tip you off for a second. Same thing happens with the microwave. Right now the new iMac and the old one are plugged into a power bar together (with a set of speakers/subwoofer, though I'm not listening to anything) and are therefore using the same electrical outlet. However, previously I had been running the old iMac with the speakers and a PC with a 19" CRT on the power bar without problems (the G4's display sleeps as well). This only happens while the aluminum iMac's display has gone completely black, and starts immediately. At first I thought maybe it was a fan, but it doesn't really sound like it. I think I read somewhere that the top-left is where the power supply is. The new iMac is fairly hot on the sides and the top can't really be touched for very long before you're sure it'll become a burn, but I think that's actually normal. Mind you, all I'm doing at the moment is Safari and Mail (and I haven't moved any data over, so Spotlight is relaxed). There's no UPS in this setup and the light fixture in question is on the ceiling with two incandescent light bulbs. The Intel machine is positioned just in front of an enclave in the desk setup and, while the top fans are roughly two inches away from the overhanging portion of the desk, all feels cool behind the machine. Sorry for writing a book, but I wanted to supply as much information as possible in hopes that someone with electrical knowledge or otherwise might have an idea on whether it's the machine, the house, or whathaveyou. I suppose if it's the house I'll just have to force the display to stay on always. I imagine that isn't healthy for the display, but is it liable to die off before four or five years have passed and a newer machine comes along? If anyone has any thoughts, I'd really appreciate it. Thanks.