>Mike...
>
>> I trust you went back to the original daughtercard in your tests of the
>> motherboard ie.
>> the 604e PCC 250 that came with the machine?
>
>If you mean - did I pull the 400Mhz card out for all the tests? Yes I did
>that. I didn't put anything in its place however, as I have nothing to
>replace it with. I assumed the chip built into the board would take over.
Cody, DO NOT buy another motherboard just yet!!
There is NO 'built in (Central Processing Unit) chip' on the PowerTowerPro
motherboard. This is 'removable' CPU technology....ie all PowerTowerPro's
are essentially the same. They can be made to run faster easily by exchanging a
'daughtercard' containing a faster CPU eg your 400mHz G3 card replaced the
original
250 mHz 604e card.
The fastest card made for the (non-Kansas) pre G3 computers was the 250
which came with the
PowerTower Pro's (although there are some third party 604e's made by
powerLogix that
I have had running reasonably stable as high as 252+ mHz in a PowerCenterPro)
When you pulled the 400mhz card you effectively rendered the computer
'brain dead',
so any further tests were made on a cadaver.
>> no startup chime means that the bus inspection being carried out by ROM on
>> startup isn't
>> getting past the CPU inspection stage...ie doesn't get to the ram
>> inspection stage to give a
>> car crash warning.
>
>I kinda know what that means, then again, I kinda don't.
The built in ROM (read only memory) on a computer contains essential
information which enables the computer to start up and do things BEFORE the
hard drive, which is the 'information
storage' component, could possibly be accessed (something has to tell the
computer to look for a hard drive , for example)
Also built into ROM is a sound that alerts you to everything being
ok...BONNNG...or not ok
SCREEECH...CRASH!!
If the ram, for example, has bit the green weenie, then you would hear a
car crash and know
that something was wrong, usually with ram (random access memory) which are
the components that are the 'interface' between the CPU and the hard drive
(simply put)
>
>> ...at the risk of sounding like a broken record, I have often suggested the
>> inline cache dimm as
>> a troublesome component on 604e equipped PowerComputing machines.
>
>If you mean the chip in the L2 slot, I yanked that for the tests as well.
The L2 cache on the Motherboard will have NO bearing here. It should have
been removed when the 400mHz G3 card went in as it becomes redundant at
that point. I suppose it COULD actually
still interfere with proper operation of the computer equipped with a G3
card and certainly
would be a test I would have performed with the 400mHz card installed.
>The only thing I had hooked up was the video display card so I could plug in
>the monitor. Then I would sequntially add components and test them
>individually under a variety of conditions. Nothing worked, the bastard
>flat-out refused to start up. I didn't swap out the PRAM battery, didn't
>think that would have had anything to do with the problem.
The computer COULDN"T start up...it wasn't a computer after you pulled the
CPU card...
it was a storage container for various computer components....8>)
>
>> I expect that we will also find that G3 cards, which have the cache mounted
>> on the 'backside'
>> of the CPU, can also fail due to damage to the cache component, which, like
>> ram, is susceptible
>> to damage from static electricity.
>
>I'm unsure as to whether Newer Technology had a backside cache mounted on
>this particular card.
I assure you that the card indeed has a backside cache.
Put the card back in WITHOUT the motherboard cache dimm and give it one
more try
Remember to put in some ram as well.
If you get a bong, let us know.
Cheers...Michael
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