With the power supply disconnected from the computer and switched off, connect the green lead in the motherboard plug to any black.  I use a bent paper clip for this. 

Now connect one drive to provide a load for the power supply, and switch it on.  If the power supply is OK, everything connected will run.

Ian Porter
Computer Guys Inc.
Arrowtown
New Zealand
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The NOSPIN Group
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  ----- Original Message ----- 
  From: Barry Pedersen 
  Subject: [PCBUILD] Testing Power Supplies


  Is there a way I can test an old power supply with a multimeter to make sure it's working properly before plugging it into a motherboard?

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