It's not a broken track or bad solder. I have inspected the card on both sides and from multiple angles with 8x microscope.
It's not my Blizzard 1260 either since I had 2 Blizzard 1260s for some months, before I sold the other one. And I tested this card on both of them.
I have thought about sending it to AmigaCenter, but all the cost sending it there and back and repair costs would very likely go beyond cards value. I don't really need SCSI for anything, but if this card would work it would make possible for me adding another 128MB of memory and to have 256MB memory in A1200 (that is something that is not possible in my A4000).
Could be the main connector loosing its pins contact or some previous owner connecting wrong cable (like parallel cable) to SCSI D25 pin connector and resulting voltages go to a wrong place).
Its such a pity when you can not know names of those connectors or other parts, so you could try to trace them down from obsolete component suppliers or track down another non-Amiga equipment that uses same parts. So even if you would have the skill and equipment for it, there is nothing you can do. :angry:
Well I will keep trying. After all I have repaired those 2 Blizzard 1260 cards last year (both of them had multiple broken tracks just like CLS2086 here said, it is a common problem).