Zorro slots, cpu slot

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abraXXious

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OKiez, well I am having yet more amiga related dramas.

It seems the only way to build a reliable a2000 is to rip out everything and put a pc running WinUae inside an a2k case.

I would prefer to just build an a2k, but it seems almost impossible to get one working reliably.

I am now down to two a2k Mbs. One is a rev 6.2 and the other is a 6.4.

Both boards are cosmetically in VGC, they look almost new. Both boards have the batteries replaced by lithium coin types. Both mbs have had the caps replaced. The 6.4 even has had the 68k socket and agnus socket replaced.

Unfortunately it seems that although the zorro and cpu slots LOOK clean and new, and they are very firm when inserting a card, they are stuffed.

Almost every card installed will generate crashes, errors, non booting etc. By fiddling around with the insertion, the system will boot and run, but if a mouse farts the change in barometric pressure causes the cards to no longer make good contact and crashes ensue.

Is there any way to "renew" cpu slot and zorro slots? I have already cleaned them (and the edge connectors on the cards) thoroughly with contact cleaner etc.
 
Almost every card installed will generate crashes, errors, non booting etc. By fiddling around with the insertion, the system will boot and run, but if a mouse farts the change in barometric pressure causes the cards to no longer make good contact and crashes ensue.
Are you sure that it's not related to PSU?
From your description I would check PSU first. I had similar case in the past with A4000D. Root cause of all my problems was +5V PIN not having good contact with A4000D mobo....
Once +5V contact repaired - no problem till now.
 
Please do.
What I also find out that electrolytic capacitors in old PSU loosing their capacity causing "voltage noise" on +5V line. The same for +12V, -12V.
It's not only Amiga PSU's - it's the same for old PC and so on.
Sorry, but it's just old electronic...

That is why it's recommended to replace electrolytic capacitors.
This I did on A4000D mobo:
http://picasaweb.google.com/stacho100/A4000DCapacitors#
 
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