Sidebar Sidebar
Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.

G5 Doesnt Boot After Shutdown

highvoltageuk

highvoltageuk

macrumors newbie
Original poster
Jul 17, 2012
29
0
Scotland, UK
Powermac G5, Leopard OS X

Hello All....Im new to mac's & have just bought a G5 after owning a G4 for a year or so.
Ok the new G5 works fine however the cmos keeps reseting the time/date.so ive got a battery on order.
However if you shut the machine down & leave it to rest for 30 second it will not startup with the power on button. ?
If you un-plug it from the mains supply & replug it in it starts fine.

Thank you for looking
 
Battery

The CMOS on a mac is called PRAM, and it's held by the battery you need to replace. Macs don't function correctly when that battery is dead. Just like any PC doesn't. Replace battery, reset pram and all should be well unless the person you got it from gave it to you with problems, like it's a dual G5 and on processor is dead. Good luck.
 
Well a new battery has been fitted & the system clock keeps time/date :eek:

However it still has the problem with not booting after shutdown unless disconnection from the mains supply:confused:

I have contacted the last owner/shop i got it from however ive had no reply:rolleyes:

Something tells me its the psu...but im no expert on mac's

Thank you for looking:D
 
Hi Everyone.... Thank you for the advice.

Yes the system power up after sleep mode & system reboot all is fine :)

The 2nd thing is i have tried to hold D key down on bootup for the diagnosics but nothing happened & i dont have the install disks as the o/s was pre-installed:mad:

It is only a minor gripe but can live with it... hopefully its something simple:eek:

Thanks for looking :D
 
The Apple Service Diagnostic discs for PowerMac G5's were never released to the public. You'll have to find them on your own.
 
I think I may have a disk image of the G5 diagnostic in an older Tech package I have from Apple. Going to look later today when I get a chance. It's on one of the hard drives in my hardware closet.
 
Is it the iMac G5 (Ambient Light Sensor) model, if so the SMU(System Management Unit) gets reset after unplugging it from the supply and that could explain a bit.

Note: If you're using an iMac G5 (Ambient Light Sensor) computer, your SMU was already reset when you unplugged and replugged the computer. You won't see an SMU reset button to press, and that's OK, as this action has already been done. (If you aren't sure which iMac G5 model you have, click here for help.)
Click to expand...
 
Nameci said:
Can I also get a hold of it? I will send you PM.
Click to expand...

So far I have been unable to locate it. I am 99% sure I have it on either an old drive or optical disk.

Sorry but I disabled the PM system a few months back as I was getting too many from people asking how they can paint their G4 also or thinking I am their personal tech.
 
Yes. So long as you have the Quad and its dual core brothers(Late 2005 G5 PCIe models), you should be fine. This ASD also supports the last hi-res powerbook G4s.

Btw, is that picture you?

Nameci said:
Thank you, it is working now. I can do thermal calibrations with the ASD, am I right? I have all of the ppc macs you have mentioned.
Click to expand...
 
Thank you PowerPCMacMan....alas i dont think it will work on my system as im under the impression its a 2003 model:mad:
I unpacked the file but only found 2 directories with readme/pdf files & im confused....sorry

Thank you for the help:)
 
Ok today my powermac has stopped working.....Now it wont start up, NO lights or fans operate....I tried to reset the prams from inside on the motherboard but no joy:(

Any ideas please?
 
Well today its back up and running again....i left it unplugged overnight & tried it this morning.....However i still have to unplug it after a complete shutdown

:)
 
You must log in or register to reply here.
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.
Top Bottom
Back