The following was sent to Obsolyte courtesy of:
Robert F Schaefer, who is the proud owner of this Sun 3/280
Here's the case of a 3-280, stripped:
The case,
front,
fans,
power supply, and 
VME cardcage.
You can't get much simpler than that!
Here're a few details of the power supply:
The
back,
front, and a closeup of the
filter.
A few more of the VME backplane:
The
back side,
front side, a closeup of the
jumpers, and the
damage that occured when I first applied power.
Here are the spare cards I have, and
here are the damaged ones, and a shot of the burned up DC-DC converter on the 
3/50 CPU card and the toasted decoupling caps on the  
CG3 framebuffer.  The damage to the 3/280 CPU, and RAM board, isn't so apparent!
And now, the pictures you've been waiting for!
Here is the front of a sun 3/280; and perhaps more interesting, the 
back.
Bonus time!  Here are a few shots on the Sun 
searching keyspace for 
distributed.net and 
scanning work units for 
SETI@home.
Ok, not really, but it could be, and probably will be eventually.