>Thank you for all the help, but I have solved the problem. I have a >flourescent work drop light plugged into the strip, but it's over at >the basement stairs - about 10 ft from the desk. I was wondering how >it could cause interference from that far away, because when I >unplugged it, the iMac stopped jittering. But then I realized it has >a big'ol transformer that I had hidden under the desk, and the iMac is >directly under it. I relocated the transformer, and the screen >stopped jittering. :-)
Although it looks like you solved your problem, it could have happened without any part of the flouerscent light being near the iMac. Many devices can send a large deal of interference back over the power line, so anything else plugged into the same outlet, and sometimes even the same circuit, can be effected. This is why I recommend using UPS or other device that will filter the power and plug only your computer and its peripherals (but NOT laser printers) into that UPS/Filter. Last printers should not be plugged into them, 1: because they can be one of those sources of power noise, and 2: they can draw too much current when warming up and potentially damage the UPS (most home/small office UPSes will come with a warning not to plug a laser printer into the UPS). If possible, I'd relocate that flourescent light to a totally different outlet, or at least stick a UPS or power filter between the iMac and the outlet containing the light. Other devices to avoid on the same outlet and possibly circuit is anything with a compressor, such as a fridge or air conditioner or anything with an AC motor (vacuums, power tools, things like that). And while you are avoiding things, watch out for cheap speakers or non computer speakers. The magnets in them can make a mess of CRTs. If you must put speakers near a CRT (this includes a TV) be sure to get ones that are shielded or designed for close proximity to a CRT. -chris <http://www.mythtech.net> -- The iMac List is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Refurbished Drives | - Epson Stylus Color 580 Printers - new at $69 | & CDRWs on Sale! | Support Low End Mac <http://lowendmac.com/lists/support.html> iMac List info: <http://lowendmac.com/imac/list.shtml> --> AOL users, remove "mailto:"; Send list messages to: <mailto:[email protected]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive: <http://www.mail-archive.com/imac-list%40mail.maclaunch.com/> --------------------------------------------------------------- iPod Accessories for Less at 1-800-iPOD.COM Fast Delivery, Low Price, Good Deal www.1800ipod.com ---------------------------------------------------------------
