[Info-vax] XP1000 hardware failure

[Paul Hardy]

chris <chris-nospam at tridac.net> wrote:
> Connectors can be the major weak link on systems, especially when
> they get old.The first thing I would do to track a fault on a
> previously good system is to unplug all connectors and reseat. That
> includes ram devices, simms etc. Perhaps you tried that already ?...
> Chris

I was system manager of an early DEC VAX-11/780 in 1980 and I formulated
“Hardy’s Law” which was that 90% of faults were loose connections, fixable
by reseating cpu, memory, or I/O boards, or unplugging and replugging
Massbus or Unibus cables. 9% were human incompetence, and 1% were real
failures of electronic components. 

-- 
Paul at the paulhardy.net domain