Hp smps power suppy ps4321 liteon help!!!

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  • NConstantinou
    Badcaps Veteran
    • May 2017
    • 348
    • Cyprus
    #1

    Hp smps power suppy ps4321 liteon help!!!

    Dear all

    i have this ps which has the reading indicated without shorting power on.
    when i short ps on the light bulb is lighting continuously.
    does this mean that there is a short!
    power supply does not come on.
    i have checked on secondary output wires 12v,3v,-12v,5v and nothing is shown ad short. also on primary.
    the black reading are from 3 optocoupler.

    Thanks
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    Last edited by NConstantinou; 05-15-2022, 02:01 AM.
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