Phipli
Well-known member
Folks,
Back in the early 2000s or so, my family had some IIci cache cards that failed somehow and would cause a sadmac when the computer tried to boot.
Being from a family that isn't great at throwing things out (we're quite good at fixing things, even if it takes 20 years to get around to it - yes I do feel shame), I have two of these cards on hand.
Was there a known common failure mode for these cards? I anticipate it wasn't electrolytics leaking given the time and that it would have been visible. I removed them yesterday as they were starting to leak. None of the ceramics look like they exploded and I can't see evidence of hot spots on the SRAM chips.
How reliable was the SRAM?
I haven't done more than a visual inspection so far as I've only just got hold of them, I'll compare the resistance to ground and Vcc on each chip on both boards to see if part of a chip is shorted. I already checked for shorted caps. Hopefully I can make at least one good cache board out of the two.
Back in the early 2000s or so, my family had some IIci cache cards that failed somehow and would cause a sadmac when the computer tried to boot.
Being from a family that isn't great at throwing things out (we're quite good at fixing things, even if it takes 20 years to get around to it - yes I do feel shame), I have two of these cards on hand.
Was there a known common failure mode for these cards? I anticipate it wasn't electrolytics leaking given the time and that it would have been visible. I removed them yesterday as they were starting to leak. None of the ceramics look like they exploded and I can't see evidence of hot spots on the SRAM chips.
How reliable was the SRAM?
I haven't done more than a visual inspection so far as I've only just got hold of them, I'll compare the resistance to ground and Vcc on each chip on both boards to see if part of a chip is shorted. I already checked for shorted caps. Hopefully I can make at least one good cache board out of the two.