Asus X55%LD Rev 3.3 with 5hz issue on powergood

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  • Bartoloni
    Senior Member
    • Jul 2018
    • 140
    • Italy
    #1

    Asus X55%LD Rev 3.3 with 5hz issue on powergood

    Asus X555LD Rev 3.3 logic board
    Hi i have a strange issue... i have the +1.05v of the chipset power supply with 5Hz zero values (5 times at second from 1.05v to 0v)
    same happens on +3vSUS ... and also on eeprom power... the 1.05V can be explained because the PG signal (on PU8200 ) is also doing this 5hz strange issue..
    i can't track this to the origin... probably related to +3V

    Anyone with schematics? ( can't identify the issue with only boardview https://www.badcaps.net/forum/showthread.php?t=100694 )

    Laptop ASUS X555LD Rev 3.3... the laptop is starting for 5-6 seconds and shutting down after that.. no shorts detected... 3.3V is stable.. 5V is stable... 1V on CPU is stable... bios and chipset have correct voltages but with 5hz zero values. (like image) i checked every switching... and all of them are not generating this 5hz issue...
    Attached Files
    Last edited by Bartoloni; 09-29-2022, 07:10 AM.
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