Lenovo Ideapad MIIX 310-10ICR won't turn on !

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  • naonao
    Member
    • Feb 2020
    • 13
    • UAE

    #1

    Lenovo Ideapad MIIX 310-10ICR won't turn on !

    Hi guys,

    I have an issue with Lenovo Ideapad MIIX 310-10ICR 80SG (M1029CWP) that won't turn on. The problem happened after I removed the battery and shorted its connection on the motherboard in order to drain residual voltage.

    Now, when I plug the charger the LED starts "red" and goes to "solid amber" after 3 or 5 seconds even though the battery is not charged yet.

    I opened it and checked the voltage. I have 1.8v on the BIOS pin after pressing the power button.
    I checked for short to ground but nothing.
    I flashed a new version of the bios using a programmer, but still nothing.

    the odd thing is that there is continuity between the two sides of a tiny capacitor near the PMIC but no short to ground. I desoldered and tested the Capacitor and found it good. Please refer to attached photo.

    Could you please help me?

    Thank you.
    Attached Files
  • Moustique
    New Member
    • Sep 2020
    • 2
    • Italy

    #2
    Re: Lenovo Ideapad MIIX 310-10ICR won't turn on !

    hi naonao,
    continuity you're measuring is maybe due to pcb traces return. You may have to take a look to schematic or to pmic datasheets at least.

    Comment

    • Duranitron
      Badcaps Veteran
      • Jul 2014
      • 544
      • Philippines

      #3
      Re: Lenovo Ideapad MIIX 310-10ICR won't turn on !

      continuity of 0 ohm? maybe there's a shorted cap.
      Never stop LEARNING because life never stops TEACHING!

      Comment

      • naonao
        Member
        • Feb 2020
        • 13
        • UAE

        #4
        Re: Lenovo Ideapad MIIX 310-10ICR won't turn on !

        Originally posted by Moustique
        hi naonao,
        continuity you're measuring is maybe due to pcb traces return. You may have to take a look to schematic or to pmic datasheets at least.
        Thank you.
        I am considering replacing the PMIC and see what it will give when I get one AXP288C.

        Comment

        • Jane
          Senior Member
          • Aug 2010
          • 188

          #5
          Re: Lenovo Ideapad MIIX 310-10ICR won't turn on !

          Did you already solved the problem?
          I measured the path resistance on those pads( from your picture) and there is NOT any continuity to ground ( on my tablet)

          Comment

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