Powering up a 20-year old MicroVAX II

Gordon JC Pearce gordonjcp at gjcp.net
Mon Feb 23 04:24:32 CST 2009

Rod Smallwood wrote:
> Hi
>    Sounds like capacitors. 
> Alhough it's a switcher any high voltage/high value capacitors in the
> PSU might well need reforming.
> Quite often you will see caps with a pair if incised lines on top. This
> makes them go pop instead of bang.
> You would not want to see a PSU where they have gone bang.

This is the only popped electrolytic I have ever seen, in damn near 30 
years of fiddling with electronic stuff:



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