Currently Being ModeratedMar 6, 2011 12:07 PM (in response to xXmatt69Xx1)Welcome to Discussions Matt - thanks for posting all your details, it saves a lot of time.
Try resetting both the PRAM and then the SMU:
1. Shut down the computer.
2. Unplug the computer's power cord.
3. Press and hold the power button for 5 seconds.
4. Release the power button.
5. Attach the computers power cable.
6. Press the power button to turn on the computer.
Once you've done that, go to Disk Utility and repair Permissions.
Please post back with results,27" i5 8 GB RAM, 21" iMac, 4GB RAM, 13" MBP 500GB, 4GB RAM, 1TB OWC quad drive,, Mac OS X (10.6.6), 15" G4 iMac, 15"iMac G3 DVD, 500GB Quad OWC HD and my beloved Cube
Currently Being ModeratedMar 9, 2011 1:02 PM (in response to MGW)Yes I tried all of that i even tried to boot in Safe Mode. It boots the same blue screen in Safe Mode too.iMac G5 17" Ambient Light Sensor, Mac OS X (10.5.8), iMac G5 17" Ambient Light Sensor | 148.93 GB | 2GHz PowerPC G5 Processor | 1GB DDR SDRAM | Build 9L31a | Version 10.5.8
Currently Being ModeratedMar 9, 2011 1:13 PM (in response to xXmatt69Xx1)That would seem to suggest that your logic board has failed. I'm afraid it's time to take it in and have it looked at by a tech. However, since you have the Ambient Light, try opening the back and look for swollen or leaking caps (little soda cans), their tops should be perfectly flat. If they are not, you have found your problem, they need to be replaced.27" i5 8 GB RAM, 21" iMac, 4GB RAM, 13" MBP 500GB, 4GB RAM, 1TB OWC quad drive,, Mac OS X (10.6.6), 15" G4 iMac, 15"iMac G3 DVD, 500GB Quad OWC HD and my beloved Cube
Currently Being ModeratedMar 12, 2011 10:22 AM (in response to MGW)Nope... not the problem. I unscrewed the three screws on the bottom of the iMac and i took the back case off and i checked the capacitors. None of them have brown leaking from them and all of them are flat. I just cant get my finger on the problem. I guess i'll have to bring it to an Apple Store or somethingiMac G5 17" Ambient Light Sensor, Mac OS X (10.5.8), iMac G5 17" Ambient Light Sensor | 148.93 GB | 2GHz PowerPC G5 Processor | 1GB DDR SDRAM | Build 9L31a | Version 10.5.8
Currently Being ModeratedMar 16, 2011 5:25 AM (in response to xXmatt69Xx1)Having the same problem with a friend's G5. She said she had installed iWork 08 and right after that her iMac started operating very slowly. I had her start up in Safe mode and that worked for a day, but now I can't even get it to start in safe mode. it also won't boot from any disk, Leopard disk, DiskWarrior, or original G5 disks. Have hooked it to one of my old iMacs through firewire (target disk mode) and can access the hard drive just fine. Ran DiskWarrior and used Drive Genius to repair permissions, but still no go. Also started in single user mode and ran fsck -y a couple of times until it said everything was fine, but still can only get to the blue screen. (note also deleted and removed all parts of iWork 08).
Her iMac was one of the ones that had the logic board problems and she had a replacement board put in about 1 year ago. Could this be a logic board issue again? is there anyway to test for this remotely (as in through target disk mode since I can't seem to get into it any other way).
JeffMac OS X (10.5.8)
Currently Being ModeratedMar 19, 2011 5:19 AM (in response to arnie)When I Try to boot from a disc, the iMac freezes.iMac G5 17" Ambient Light Sensor, Mac OS X (10.5.8), iMac G5 17" Ambient Light Sensor | 148.93 GB | 2GHz PowerPC G5 Processor | 1GB DDR SDRAM | Build 9L31a | Version 10.5.8
Currently Being ModeratedMar 20, 2011 8:14 AM (in response to xXmatt69Xx1)if it freezes when booting from the install disc, it's likely a hardware problem since any software on the computer is bypassed.
could be different things - RAM, hard drive, possibly the logic board.
at this point it probably needs to be opened up to examine the logic board or maybe swap the hard drive to test.
if it's a hard drive, the fix is not so bad, failed logic board is not worthwhile replacing.Windows XP Pro, Dell D620, MBP 15" 2.16GHz, 10.6
Currently Being ModeratedApr 12, 2011 6:26 PM (in response to arnie)Logic Boards are very much too expensive. I would be better off buying a new iMac. Thank you for your help! You have very good answers! I don't know what I could of possibly done. I guess she was just an old G5 anyway. PowerPC's always get Kernel Panics, Logic Board Failures, etc. They are very old, you just can't blame the iMac. Anyway, I just bought an iMac 17" Intel Core 2 Duo 1.83GHz iSight Camera 512MB SD DDR RAM but... FOR PARTS OR REPAIR! I don't mind repairing things, I actually think It's kind of fun. When It comes, I'll probably need your help for this one. The seller said It would turn on with a question mark folder (WHICH CAN MEAN MANY DIFFERENT THINGS). But like I said In one of my posts, I'm only 14 years old so... all I want Is an Intel Mac. PowerPC was starting to **** me off. Every application nowadays Is Intel required anyways. Like all the graphics apps I never got to use on my iMac G5 that I like FOR INSTANCE: Cinema 4D, Adobe Photoshop CS5, Adobe After Effects CS5, SOny Vegas 9 Pro. They were all Intel required. I just hope I can fix this iMac thats shipping. I will really need your help soon!
Currently Being ModeratedApr 14, 2011 5:41 PM (in response to xXmatt69Xx1)thanks for the update, keep in mind that the voltages can be dangerous around power supply area, if you decide to disassemble iMac.Windows XP Pro, Dell D620, MBP 15" 2.16GHz, 10.6
Currently Being ModeratedApr 18, 2011 6:50 PM (in response to arnie)
Yeah, and the seller said that the iMac wouldn't even boot from an external hard drive so I'm worried that It's a Logic Board failure. Well, we'll just have to wait and see. Hopefully It is a hard drive or software problem and I didn't buy It for no reason! I can easily replace the hard drive.
Currently Being ModeratedApr 18, 2011 6:57 PM (in response to xXmatt69Xx1)
matt try jholding the opt key on start up till it goes to a screen that will show a hardrive i a square wait for the square to finish loading then click it to boot into os x it might work i have a g5 and have had the same problem and this works every time
Currently Being ModeratedApr 18, 2011 7:46 PM (in response to prosurfer93)
Thank's for the post I'll try this when the iMac Is shipped here i have read on some forums that this is usually caused by the iMac forgetting where to boot from so you need to remind it by doing this. Hopefully It works!