[rescue] SGI 320's

[Larry Snyder]

Andrew Weiss <ajwdsp at cloud9.net> wrote:
> Speaking of which... oh the irony.  I just had a service call for one 
> of these today.  The LCD panel video daughterboard is probably the 
> issue.  The thing has horizontal travelling defects (multicolored 
> vertical stripes that look like a set of NMR data before a Fourier 
> Transform [vertical scribbles very close together <no gaps> of varying 
> length] that show up more on black backgrounds and such).  They travel 
> like a TV with bad vertical hold settings.  The VGA signal is good.  
> Anyone have any ideas.  My first inclination is the daughterboard, but 
> then I was trying to figure out what would contaminate a digital signal 
> in that fashion.

Hmmm...old fashioned knowledge asks:  Got a filter cap going south
in the power supply?
-ls-