my Data General Nova 4/X, disk woes continue
eric at brouhaha.com
Mon Apr 25 19:26:47 CDT 2005
> I am never in favour of shotgun replacements. It's the brother of
> board-swapping in that you don't know what the fault was, you don't know
> you've found it, so you can't know it's fixed.
I'm not a fan of shotgun replacements. Board-swapping can be a useful
diagnostic measure, in that if you swap a board out and the machine
starts working, you have most likely isolated the fault to that board,
making it easier to focus your efforts to track down the actual failed
I've found this technique to be especially useful when the symptom is
Of course, if you're not careful, it's possible that there was some
fault that damaged that board and will damage the one you swap into
its place. At the very least the power supply voltages should be
checked before board swapping.
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