Coincidentally, I just gave up on a 1.8 GHz G5 iMac and put the power supply on eBay about an hour ago. The symptoms sound similar and my understanding is that the capacitors on the motherboard are shot .
I did put a new battery into it but it still acted funny, not waking from sleep, shutting itself down or restarting all by itself. I have a 24 inch intel so I can't be bothered.. M On Tue, Sep 29, 2009 at 9:14 PM, Charles Lenington <[email protected]> wrote: > > Beverly Woods wrote: > > Hi folks, > > > > I have here an Intel iMac (20", early 2006) that appeared to be > > working normally, except that reportedly sometimes it took a long while > > of black screen to wake from sleep. I attempted to upgrade the RAM from > > 512 to 2G (known good RAM that works fine in another of the same > > machine). After I did that it would not power on at all - no light, no > > noise, nothing. I went back to the original RAM, it still would not > > power on until a lot of unplugged time had passed, and now it starts or > > won't start intermittently: if it starts normally it seems happy to > > restart after that, but once it won't start it seems to want to be left > > unplugged for a while or it won't start later. Also if I do anything > > with the RAM (try to add another chip, move the existing chip to a > > different slot, etc.) it won't start for quite a while after that. The > > 512 appears to be recognized in either slot, once I get the iMac started > > up, but so far I haven't had any luck booting it after installing a > > second chip - but of course as with all intermittent issues I am not > > certain if it might at some point. > > > > So, my question before I go about replacing the power supply: is > > there anything that could cause this issue besides a faulty power > > supply, especially any type of logic board failure that could cause > > this? (It looks to me like it would be worth replacing the power supply, > > but if there is a problem with the logic board that probably would not > > be worth replacing.) > > > > TIA, > > > > Beverly > > > > - > Long shot but maybe pram battery. > > > > --~--~---------~--~----~------------~-------~--~----~ 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 [email protected] For more options, visit this group at http://groups.google.com/group/imaclist -~----------~----~----~----~------~----~------~--~---
