HP Pavilion 14-ek0106TU doesn't post

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  • an_kiwi
    Member
    • Oct 2023
    • 15
    • New Zealand
    #1

    HP Pavilion 14-ek0106TU doesn't post


    Hi guys. Bringing up the old repair.
    HP Pavilion 14-ek0106TU i5-1235U onboard RAM

    Symptoms: When power plugged - white LED is on, when battery connected - the battery is charging.
    Pressing power button - it lits but nothing happens. When lit pressing and holding 5-6 sec - it turns off.

    Voltages: BIOS 3.3v presented when power button is pressed.
    Powered off: Nothing is on except 1.2v
    Powered on: 1.8v, 3.3v, 5v, 13v comes to cpu driver mosfets.
    Resistance is measured after the coils. I couldn't find the PCH rail though (is that 19 ohm? too low?)

    ​I made the cpu thermal when power button is pressed. PCH looks suspicious. But I cannot find 1v rail that feeds it.
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