On Jul 18, 2009, at 2:28 PM, [email protected] wrote: > My dual G5 won't boot now. Here's a synopsis of the problems: > > 1. usually hangs up at the white screen with the gray logo > 2. sometimes hangs up there and then shuts down on its own
Have you done Safe Boot holding the Shift key? After doing a Safe Boot, reboot holding the Cmd-v keys for the verbose dialog and if it hangs notice what the dialog is saying just prior to the hang. You might also dig around in Console logs for what the problem might be. > 3. the tech had it working for 4 hours this morning & then it stopped > - he changed the pram battery since it's from June 2004 approx. I assume this means this is a "June 2004" G5 model? There was a firmware update for this model, is would seem unlikely that's the issue since Software Update should catch outdated firmware, but you might check just to be sure. You can look in System Profiler>Hardware>Boot ROM version to see, it should be v.5.1.8f7 which you can download here if needed: <http://support.apple.com/downloads/Power_Mac_G5__June_2004__Firmware_Update_5_1_8f7 > > Is there a way to troubleshoot a bad motherboard. Do you have the original CDs? I think one is a "dual boot" CD where you hold the Option key and it gives an option to boot a hardware test. There are also so-called Apple Service Diagnostic discs (ASD) that are meant for Apple service technicians to use. You may be able to download one from a torrent site, but finding the correct version for your specific G5 may be difficult. I believe v.2.5.8 may be the correct version, search Google for "June 2004""Apple Service Diagnostic" and you may be able to find one, but I don't know it will help. Again, I think it's a "dual boot" DVD, so you'll need to know how to boot it and use it. Probably not too helpful in my opinion because if you need this, you've got a really screwed up Mac that needs more attention than an average user can muster. > 1 of the 2 fans isn't working. There are 5 fans in a dual G5, two on each side of the CPUs and one above for the HD(s) and optical drive. It would be a good idea to get all 5 working if possible, but I agree, it's not likely the problems unless you've got a severe overheating issue, and normally the fans would kick on REALLY hard if it sensed any overheating. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed Low End Mac's G3-5 List, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-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] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/g3-5-list?hl=en Low End Mac RSS feed at feed://lowendmac.com/feed.xml -~----------~----~----~----~------~----~------~--~---
