Powermac G4 dual - one cpu died

[kasuja00]

Hi,
I have my Powermac G4 quicksilver dual 800 MHz that years ago i overclocked to dual 867 MHz.

Yesterday I turn on it and i found that only one cpu worked and without L3 cache!

I turned the frequency back to the original value (800 Mhz) but the system info show me only one CPU without L3 cache.

Which component can I control?

Thank you.

 

[Raging Dufus]

Which component can I control?

Not sure what you mean by this, but it's time to replace that CPU daughterboard. Whatever killed the one CPU and the L3 (probably accumulated stress from the overclocking) will almost surely catch up to the working CPU soon. Just replace it, and if you wanna go faster, try to find a dual 1 GHz board.

 

[kasuja00]

Hi, thank you for the answer.
Now I replaced it with a processor board that I already have (a single 933Mhz).
I would like to try to repair the broken daughterboard but I don't see any apparently fried resistors or capacitors.

 

[Raging Dufus]

I would like to try to repair the broken daughterboard but I don't see any apparently fried resistors or capacitors.

Given what you described, I wouldn't expect to see any fried components. There's probably nothing wrong with the board electrically, otherwise the one remaining CPU wouldn't function at all. As far as repairing it goes, you'd probably have to desolder the failed CPU and remove it from the board (and while you're doing that you might as well replace the working one too, because I doubt it will last much longer), and do the same with the L3 chips. Replace them all with working units, and you'd probably be good to go.

But, that's all far easier to say than to do. I've never attempted something like that. If you don't have the skills, I'm sure you could find someone within a reasonable distance of you that does board-level repairs. But it probably won't be any cheaper than trying to source a good replacement daughterboard from eBay or whatever similar sources you may have access to. Good luck!