On Apr 19, 2009, at 1:24 PM, owen wrote:
> > I took it apart again (this time all the way) and can't find any > pinched wires. If I look thru the exhaust holes in the top, I can see > the fan blades twitching - like the fan is trying to start but > failing. They jerk about 1/8 inch, then fall back and bounce a little. > This happens about every second. > > Any ideas? Either the fan isn't getting enough electricity, or it has an internal problem such as a seized bearing or shorted wiring. Can you get the blades to spin freely? At this point you probably should replace the fan unit with a known good one, preferably an Apple/G4 iMac fan. I say this because any 3-9/16-inch-square by 1-inch-deep fan that turns clockwise and blows up/away (when viewed from the label side) should work. But the horizontal slits around the fan case were designed to help suck in air from the periphery of the dome and thus enhance the iMac's cooling, so just any old fan most likely won't work as well as the Apple design. I'm not sure if all G4 iMac fans had the same specs, but one I pulled from a G4 1 GHz 15" iMac is a Superred model made by Cheng Home Electronic S., Ltd., China. It's DC 12 volts, 0.26 amp, model CHA9212DS-TF. Jim Scott --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to Low End Mac's iMac List, a group for those using G3, G4, G5, and Intel Core iMacs as well as Apple eMacs. The list FAQ is at http://lowendmac.com/imac/list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to imaclist@googlegroups.com To unsubscribe from this group, send email to imaclist-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/imaclist?hl=en Low End Mac RSS feed at feed://lowendmac.com/feed.xml -~----------~----~----~----~------~----~------~--~---
