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skinniezinho

macrumors 65816
Jan 1, 2009
1,101
95
Portugal
10 years after and here I am with same issue on a g5.
Powermac G5 7.3, can't boot hdd (know good one with sorbet leopard), can't boot leopard dvd, one long beep on the start.
Passes ASD OK
By any chance did anyone found the culprit/solution?
 
Last edited:

Certificate of Excellence

macrumors 6502a
Feb 9, 2021
945
1,458
10 years after and here I am with same issue on a g5.
Powermac G5 7.3, can't boot hdd (know good one with sorbet leopard), can't boot leopard dvd, one long beep on the start.
Passes ASD OK
By any chance did anyone found the culprit/solution?
One beep indicates there’s some issue with the ram - that it’s not detected. I’d try reseating the ram. Make sure it’s installed in the correct order in pairs. If that doesn’t work, try just one pair of known good ram. Here’s a quick description how the order goes if you need it.

Good luck.
 

skinniezinho

macrumors 65816
Jan 1, 2009
1,101
95
Portugal
One beep indicates there’s some issue with the ram - that it’s not detected. I’d try reseating the ram. Make sure it’s installed in the correct order in pairs. If that doesn’t work, try just one pair of known good ram. Here’s a quick description how the order goes if you need it.

Good luck.

Thank you for the tip.
Did that. The beep disappeared.
Still doesn’t boot.
Tried:
Reset smu with cable plugged in. No change
Reset smu without cable plugged in. No change

While searching for this issue I found the following commands to be done in OF:

Reset nvram: code gives ok
Set-defaults: code gives ok
reset-all: computer freezes

Also, I didn’t mentioned but in of it appears me usb errors
And while booting sorbet leopard hdd in verbose mode it halts at

DART enabled

OSX leopard dvd doesn’t boot also. Both from internal dvd drive nor FireWire one (which boots ASD).
ASD OS Also can’t boot.

Right now from what I already read it leaves me the following options:
-Pram battery: mine is dead. Will try to get a new one
- logic board issue (capacitors?ram slots?)
-power supply capacitors (I found some threads talking about it).

Truly bizarre it passes ASD test.
If anyone has more precise hints let me know
 

Doq

macrumors 6502a
Dec 8, 2019
533
798
The Lab DX
Moonshot, but check the LEDs on the inside while powering up. There should be several. Some of them should be lit up (I think the green one is good) but if any of the others light up (especially after the boot freeze) you got a problem.
 

Certificate of Excellence

macrumors 6502a
Feb 9, 2021
945
1,458
I replaced the psu on my a1047 years back when it failed but IIRC the behavior you are describing is not what I experienced as you can still run ASD tools etc. Mine was 110% do-nothing-dead when the PSU went on mine. Being that you corrected the ram issue beep and the LED powerbutton is not flashing a ram issue code (2/3/4 blinks) leads me to think capacitor failure on the logic board or cpus somewhere.
 
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