Thanks for the replies.
The machine is working again, after another 15 hours of trying this and that, ...
I thought I explained it correctly, but of course I put out everything.No success even with just the motherboard and processor, than nothing with motherboard/processor and RAM, ...
As well I swapped back in the original 604e, nothing. Well first issue - that is still unsolved - is an totally fucked up internal Fast-SCSI bus. I don´t know why, but it´s not attached now (and solvable without too huge problems).
But the real thing that caused all the problems:
You´ll never guess, ... it is a mechanical problem! I recognized that I got a chime sometimes when the cards are not directly in an 90° angel attached to the board. Than I remembered that I was not always using the srews for PCI cards. So I pushed all the necessry PCI cards (the Acard 6280M, and the Graphiccard) AS the processor daughtercard to the left - in the direction they would normally look slightly when the Mac is standing around. And: tataaa! Tha machine booted immediatly.
So I got a theory: over the years, the contact pins of the slots got pushed up in one direction by the weight of the cards itselves. If not all cards sit inside whith 2 or 3 degrees to the side (or down when the 9600 is installed normally), there is no contact and the machine does not boot.
It´s a little bit crazy to have to do something that feel wrong, but at least it makes some sense. What supports me with my theory is that the slots where the heavy cards (the Voodoo, the Adaptec) were installed allow a bigger angle, than the ones with smaller cards like the Acard. The crazy thing that I would have never found out if not everythign would have been right in fromt of me at my table, is that even the ZIF slot and the PCI slots seem to got this problem. All cards have to be pushed to one side (down).
So, it seems to become an Happy End for now. Next steps are to follow your advice with the electronic cleaning solvent, as to clean some parts with Isoprpyl. Than I´ll try to solve my SCSI troubles at the internal Fast-Bus and subsequently will try to reassemble everything. Perhaps I´ll even get some Papst fans for the Voodoo and the Sonnet
The machine is working again, after another 15 hours of trying this and that, ...
I thought I explained it correctly, but of course I put out everything.No success even with just the motherboard and processor, than nothing with motherboard/processor and RAM, ...
As well I swapped back in the original 604e, nothing. Well first issue - that is still unsolved - is an totally fucked up internal Fast-SCSI bus. I don´t know why, but it´s not attached now (and solvable without too huge problems).
But the real thing that caused all the problems:
You´ll never guess, ... it is a mechanical problem! I recognized that I got a chime sometimes when the cards are not directly in an 90° angel attached to the board. Than I remembered that I was not always using the srews for PCI cards. So I pushed all the necessry PCI cards (the Acard 6280M, and the Graphiccard) AS the processor daughtercard to the left - in the direction they would normally look slightly when the Mac is standing around. And: tataaa!
Tha machine booted immediatly.So I got a theory: over the years, the contact pins of the slots got pushed up in one direction by the weight of the cards itselves. If not all cards sit inside whith 2 or 3 degrees to the side (or down when the 9600 is installed normally), there is no contact and the machine does not boot.
It´s a little bit crazy to have to do something that feel wrong, but at least it makes some sense. What supports me with my theory is that the slots where the heavy cards (the Voodoo, the Adaptec) were installed allow a bigger angle, than the ones with smaller cards like the Acard.
The crazy thing that I would have never found out if not everythign would have been right in fromt of me at my table, is that even the ZIF slot and the PCI slots seem to got this problem. All cards have to be pushed to one side (down).So, it seems to become an Happy End for now. Next steps are to follow your advice with the electronic cleaning solvent, as to clean some parts with Isoprpyl. Than I´ll try to solve my SCSI troubles at the internal Fast-Bus and subsequently will try to reassemble everything. Perhaps I´ll even get some Papst fans for the Voodoo and the Sonnet