WTF?? Computer Hell part 2

This is a revisit to a thread I started in late March. To get an idea of what I have done so far and to get a more detailed description of the problem please take a look at the thread here.

Short recap: got a Quicksilver G4 800mHz running 9.2.2 (german os) that has all sorts of problems crashing. So far I have done or had the following done in an attempt to fix this problem.

Completely reformated the hard drive twice reinstalling 9.2.2 and system updates.
Removed all peripheral stuff (USB drives, adaptec 2906 scsi card, network cable).
Had motherboard replaced.
Had power supply replaced.
Switched out RAM
Had electrician come check out the circuits in the building (A-OK).
Switched monitor card

All together this machine has been to the shop 4 times. And they say they could never find a problem.

After getting the motherboard replaced it ran smooth for about a week and then the problems started up again. Like I said in the previous thread I can not replicate the problem. As soon as you think "Aha it only happens when the case door is open pointed north east" the problem goes away and another pops up.

Since the last time we have had the machine back it has been a little more stable but it still has problems. So far we have received the following errors accompanied with the bomb (Fehler, in this case, is the German word for error):
Addressfehler (2) x3 at start up
Fehler (11) x2 at start up
Fehler (3) at new start
Fehler (UhrzeitSync) Something to do with the clock sync. This asked me to reinstall system software, and open transport.
Fehler 10 Desktop Print Monitor
SystemFehler "Eudora (2)"
Filesharing extension (10)
ATIGraphics Accelerator-Adressfehler (2)

A few times it has just completely frozen stiff.
Once the mouse started "pulsating" according to witnesses. (Carol Ann, Carol Ann, is that you?) That could have been a hangover though ;-)

Almost everytime when a system error pops up and the user is prompted to restart, the computer restarts with no problems. Additionally, it almost always boots properly when exstensions are disabled.

I'm about to chuck this piece of crap out the window. The thing is if we go directly to apple and they say to take it to the nearest authorized repair center it will be the 5th time it has been there.

Any thoughts, suggestions, ideas?

Nate

 

True, True. I'd be looking raving mad waving a gun around muttering things under my breath like, "Ahma gunnuh git you Billy Boy". Or maybe I would just chuck it out the window.

OSX is unfortunately not an option right now. This decision is not mine. I run X at home and on my iBook but at work our typsetters need quark 3 and a bunch of scripts that go along with it. I've bitched and moaned all I can. Ugh. F*ckers.

 

??Btrule out an exstension conflict because we have already completely wiped the hard drive twice and were still having the problems with just the Mac os standard set with no additional hardware/software.

Also the network connections seem to be okay. We don't have any problems with any other computers on the same hub or when we connect them to the same cable. the computer would also crash when it was not connected to the network at all.

Also as I stated in the original thread, it would sometimes crash when we would change the hardware configuration. Especially wierd was that one day it would only start up if the case door was opened and laying open on the ground. When you shut the door and started it up it would crash. Also once for about a week, it would always crash if any device was in USB port2. Wierd.

We have two identical machines that are running the same software except the problem machine has a scanner attached with a Adaptec 2906 scsi card. These other machines have no problems. We have already removed the scsi card but the problems remain.

The only thing that we haven't swapped out is the Processor. With the Apple Hardware test CD that came with the computer, it checked out ok. Is there any other way to test it and see if it is okay with out actually taking it out and putting another in?

Nate