Ditto, I've replaced (or retired) literally hundreds of GX260's for bulging/defective capacitors on the main-board. The machines would start with intermittent hanging then eventually fail altogether. The caps start to bulge out on the top, sometimes leaking like an old battery. 


--- On Mon, 6/25/12, Wayne Davis <waydavis.phx.lists@gmail.com> wrote:


  

    
  
  
    You COULD have a flaky Power Supply
      such that high rail load is bringing it out of spec.   Be careful
      swapping one tho.   Some of the older Dells use a proprietary
      pin-out on the PS connector.  It's the SAME connectors, but wired
      differently.  LOOK at the colors going to what pins if you choose
      to test this theory.  If it this type, you'll smoke a PS tester if
      you plug it into it.  Bulging Caps ( a well know issue with Old
      Dells) on the MB could be a sign of unclean power too.

      

      My 2 cents

      

      :-)