> When the cg6 was removed it booted.  The centre of the main SunGX
> chip is a bit browned and trying to boot with it I noticed it was
> very hot.

Oh, that does not sound good.

First thing I would do is get out a vacuum and vacuum out all the dust
grilles.  Sounds as though cooling was insufficient, which to me says
that either fans have gone out or things are clogged with dust.  If the
machine hasn't been vacuumed out in the last year or two, my money
would be on dust.

> The cg6 sat in my old ss2 for years with no problem and then 1 day in
> the new ss5 and kaboom.

That's one reason I suspect cooling.

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