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   sci.electronics.repair      Fixing electronic equipment      124,925 messages   

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   Message 124,898 of 124,925   
   Harvey Sanenbum to All   
   wiring up alternate desktop power switch   
   31 Jan 26 09:22:57   
   
   From: harvey50120@micro.net   
      
   I have an old Dell XPS 420 desktop that wouldn't power on today.  I had   
   a hunch that it might be the front power switch, so disconnected the   
   power from the motherboard and then located the green wire on the power   
   supply.  However, much to my surprise, there were two green wires.  When   
   I jumpered one to ground, nothing, but when jumpering the other, power   
   supply fan started up.   
      
   Before reconnecting power to the motherboard, I cut the green wire that   
   did work and temporarily extended it with a jumper wire.  Power was   
   reconnected and the jumper wire to ground.  The power supply started,   
   but it was only after I then pressed the front power button on the   
   desktop that it started right up.  In fact, I'm sending this message   
   from it now.   
      
   I'm a little confused about the wiring and power switch type.  The   
   switch must have only partially failed since it still works with the   
   aforementioned configuration.  However, I think the option, to get   
   things back to normal, is to either replace it, which I think would be   
   next to impossible given the old age of the PC, or simply wire up a   
   toggle as a substitute, but not sure of the wiring.   
      
   Might it be as simple as snipping that additional green wire, splicing   
   both green wires together, and have that go to ground for start up/ turn   
   off, or is it something more?  I almost think a temporary switch is   
   needed somewhere since the front power button is only depressed until   
   power up and then released.   
      
   trying to keep everything simple, but it seems a little complicated to   
   me.  Thanks in advance for any help.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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