Hello, my beloved Powermac Dual 1.8 has been giving me a problems lately. It wont wake from sleep and after I reboot it, it wont even start. After the chime, the screen stays blank and the fans start roaring high after a few minutes. I brought it to the Genius Bar. They ran diagnostics on it and concluded that the problem is the 3rd party RAM. I then removed the RAM when I got home and it worked for a day. Now, the problem is back. I already reset the the VRAM and the SMU. I'll bring it back today to the Apple Store but I dont know if they will even entertain me this time as they didn't even charge me for running the hardware diagnostics last time. BTW, no PCI cards installed except for the original video card and no external device is connected. Any thoughts?
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G5 not waking up from sleep
- Thread starter noel4r
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Yup, I've done that. It manages to start the computer but it freezes again when it goes to sleep.
Sounds like you are experincing a known issue with that model range, check your serial number range
http://www.apple.com/support/exchange_repair/powermac.html
Dont beat yup the Geniuses on this one they have to remember a lot of numbers and sometimes a few can sneak through just bring it the paper work and the machine and they can verify/deny this issue for you.
http://www.apple.com/support/exchange_repair/powermac.html
Dont beat yup the Geniuses on this one they have to remember a lot of numbers and sometimes a few can sneak through just bring it the paper work and the machine and they can verify/deny this issue for you.
That program is only for Dual 2Ghz, Dual 2.3Ghz and Quad 2.5Ghz PowerMac G5s. The OP has a Dual 1.8Ghz PowerMac G5.
Once you have removed the third party ram, insert your orginal "grey" disc that came with your tower, disc 1. Boot your system and hold down option. If you system doesnt boot try using a PRAM/PMU reset to try and get it going. If you can get up select the AHT boot partition and you can run the same test the genius most likely ran and see if you get any errors. If you do it will lead you down the right path.
You are certainly experincing a hardware failure, the problem with towers is it is real hard to narrow down. The power supply sounds like a cause of failure on this since it may not be putting out the proper trickle voltage which can cause your CPU to freeze up when it goes into low power sleep. It can be a damaged CPU which will prevent it from entering low power mode, or it can even be a logic board which could not be properly reading your ram.
You are certainly experincing a hardware failure, the problem with towers is it is real hard to narrow down. The power supply sounds like a cause of failure on this since it may not be putting out the proper trickle voltage which can cause your CPU to freeze up when it goes into low power sleep. It can be a damaged CPU which will prevent it from entering low power mode, or it can even be a logic board which could not be properly reading your ram.
http://www.apple.com/support/exchange_repair/imac.html
I had this exact same problem. I sent away for the new PSU and it was fixed.
Though after a while, Sleep mode stopped working and would instead shut down the iMac. Weird. I just turned the screen off instead.
I had this exact same problem. I sent away for the new PSU and it was fixed.
Though after a while, Sleep mode stopped working and would instead shut down the iMac. Weird. I just turned the screen off instead.