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  1. #1
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    820-00840 pulsing P3V3S5_EN

    I've got this clean board which doesn't power on as PP3V3_S5 was pulsing.
    I've traced this to PP3V3S5_EN pulsing.

    So far I've got:

    PPBUS_G3H 13v
    Charger 20v 0.01A
    PP3V3_G3H 3.4v
    PP5V_S5 pulsing 2.5v-5v
    PP3V3_S5 is showing around 18K to ground so isn't shorted

    Anyone got ideas of what to check next?

  2. #2
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    Re: 820-00840 pulsing P3V3S5_EN

    Update:
    I've checked PP1V_S5G and this is shorted to ground.
    I'll inject some voltage and see what gets hot.

 

 

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