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A possible fix for a highly unstable G3 or G4 Tower
Authored by: Arturia on Sep 08, '05 08:52:45AM
Well... no ;-]

If you've got problems with one of your drives, first unplug your comp,
and remove the little lithium battery from the motherboard [replace it if needed]

Then, reset the cuda button that's onto the motherboard. [similar to a little pill]
Resetting means that you push it ONE [1] time.
Put the battery in place and replug your comp.

Some static electricity (or thunderbolts) can affects these connections.
Unpluging and repluging your drive may help.

I've got huge thunderbolts lately and my drives weren't showing up at startup. [the dreaded "No System" message]
I got a surgebar, so I don't know if the problem is really due to thunderbolts, or even static electricity... or else

Anyway... It was like my drives were totally vanished [TechTool, Disk Warrior and tutti quanti... were of no help]

Resetting the cuda and the unplug/repluging fixed it for me :-)

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A possible fix for a highly unstable G3 or G4 Tower
Authored by: Arturia on Sep 08, '05 09:13:34AM
Here's the correct procedure that I've found somewhere on internet

Many system problems can be resolved by resetting the PMU chip.
Whenever you have a unit that fails to power up, follow this procedure before replacing any modules:

1. Disconnect the power cord and check the battery in the battery holder
The battery should read 3.3 to 3.7 volts.
If the battery is bad, replace the battery, wait ten seconds, and then reset the PMU (refer to the next step).
If the battery is good, go to the next step.

2. Press the PMU reset switch (S1) once on the logic board and then proceed to step 3.
Do NOT press the PMU reset switch a second time because it could crash the PMU chip.

3. WAIT ten seconds before connecting the power cord and powering the computer on.

4. Run Apple Hardware Test.

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A possible fix for a highly unstable G3 or G4 Tower
Authored by: vsopal on Sep 08, '05 10:37:15AM

I'd checked it at the beginning of "slow death" of my G4 and I've check it now once again.
It didn't helped then and it didn't helped now.
Thanks for trying. Maybe you can think something else? I've run out ideas.



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