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How to turn on AT power supply?

Discussion in 'Electronic Repair' started by root, Jun 3, 2009.

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  1. root

    root Guest

    I know I can turn on an ATX power supply by connecting
    the green wire to the black wire next to it. This
    doesn't work for the older AT power supplies. What
    is the trick for them?

  2. Bryce

    Bryce Guest

    I think they just need a minimum load ... a hard drive
    ought to do the job.
  3. root

    root Guest

    Thanks for responding. I just didn't pay close enough
    attention: the AT and ATX supplies use the same pins
    to turn on, the wire colors are not the same across
    brands. For the record, if you hold P1 with the catch
    on the top and the pins facing you, you connect pins
    3,4 on the top row counting from the left.

    These power supplies are useful for other sources on
    the bench.
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