On Jun 10, 2011, at 4:00 PM, Amanda Ward wrote: > A lot of time on my hands has prompted me to look into why my iMac G5 (first > gen) quit working. > > Posting the symptoms here got the opinion the power supply took a header. It > was supposed to have had the PS replaced before I bought it, but hey! > I don't mind putting another PS in the unit, but I have questions... > > I see a few power supplies on eBay, but I'm unclear on which ones will > work... Interchangeability between models? Specific part numbers?
Amanda, You don't say whether your iMac G5 (first gen) is a 17" or a 20" model. Each model had a specific power supply with a specific part number because of the requirements to power a specific-size LCD. Note: I've tried using a 17-inch power supply in a 20-inch and vice-versa; it doesn't work. Note: Power supplies can be interchanged between the first-gen iMac G5 and the second-gen iMac G5 ALS (ambient light sensor) models of the same screen size. If putting a second-gen ALS power supply into a 1st-gen iMac you will have to remove the ALS sensor and cable. However, the power supplies for the third-gen iMac G5 are completely different and cannot be used with earlier G5 iMacs such as the one you have. According to Apple service manuals here are the part numbers: 20-inch iMac G5: -- 1st gen: 661-3289 -- 2nd gen (ALS): 661-3625 17-inch iMac G5: -- 1st gen: 661-3290 -- 2nd gen (ALS): 661-3627 That said, there are other part numbers out there. The crucial thing is that the power supply be the correct one for your screen's size. Good luck. iMac G5 models are filled with all sorts of wicked problems, from bad capacitors on logic boards *and* in power supplies, to thermal sensor issues, to GPU cold solder joints, to optical discs that launch onto the desk (Surprise!). Fortunately, Apple has long since worked out all those issues. I consider all white iMac G5s to be booby-trapped beta test beds. :^) Jim Scott Eureka, CA -- You received this message because you are a member of the iMac Group, a group for those using Apple iMacs and 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 leave this group, send email to imaclist+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/imaclist
