How to revive a dead 9600/300 and 8500/120 Powermac

I now have a 9600/300 and a 8500/120 Powermac. Both ran perfect when I bought them used for a day after I updated their system software to 8.6 for many hours. After shutting them down both would not restart (completely dead). I did the usual procedures: new battery, cuda reset, processor reset, tried to start up on external Zip drive with a known good 8.6 system on a disk.
Nothing! I am at the end of my know how. Most Mac owners I know come for
help to me. Any ideas on where to go from here? Please help!
W.W.
G4 867 MHz, 9600/300, 8500/120, 7500/100, Classic II,

G4 867 MHz, 8500/120, 7500/100, Classic II,, Mac OS X (10.4.3)

Posted on Mar 29, 2006 7:39 PM

21 replies

Apr 2, 2006 6:11 PM in response to Walter Wedler

This procedure is just an attempt to simplify. The idea is that if your Drives are mucking things up, disconnecting them may get you a chime when you attempt to start up normally.

If this does not help, it may be time to pull out the motherboard and remove and re-seat everything in a connector and try again.

Walter Wedler Author

Level 2

290 points

Apr 3, 2006 4:53 AM in response to Grant Bennet-Alder

Thank You Grant.
I will do that next. I will keep you posted.
Walter

Walter Wedler Author

Level 2

290 points

Apr 3, 2006 4:11 PM in response to Grant Bennet-Alder

Hi Grant.
I just got done (wearing a static band) unplugging everything from the mother board and then plugging all back! Followed by all start-up rutines I did before: Nothing!! What's next?
W.W.

Apr 3, 2006 4:30 PM in response to Walter Wedler

Well, there are only about two other things I can think of:

Remove most of the memories and try again.

Wiggle the processor in the hope that it is just the slightest bit sloppy in its socket and re-aligning it may help, and try again.

Apr 3, 2006 4:39 PM in response to Walter Wedler

Walter,

I have the luxury of space so I keep spare parts around. The last recycler that I visited marked the G3 DTs and MTs down to $10 a piece and would probably accept $5 apiece if I took them all. Be watching for spare 8500/9600 towers to save them from the landfill.

Jim

Walter Wedler Author

Level 2

290 points

Apr 4, 2006 5:03 AM in response to Grant Bennet-Alder

Grant,
Thank you so much for all your time and patience.
I will keep you posted.
Walter

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How to revive a dead 9600/300 and 8500/120 Powermac