Lenovo Y700-17ISK turn on and off

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  • pajdek
    New Member
    • Sep 2023
    • 4
    • Pol
    #1

    Lenovo Y700-17ISK turn on and off

    Hello, i have some issues with my laptop Lenovo Y700-17ISK (motherboard BY511 NM-A541), it started when i turn on the laptop, but the lcd wont turn on, i then connected it via hdmi to tv and screen was ok. So i thought maybe lcd stripe is faulty, i removed the bottom cover, disconnected main battery, reset the cmos by disconnecting battery for 1 min, then slighty move the lcd stripe. Conncted power supply and tuned on my laptop, the lcd turn on, it started to load os, then it turn off, after a second it turn on, then after like 3 seconds turn off again, and so on. Removed power supply, waited few minutes and connected power supply again and the laptop turn on itself for few seconds, then turn off, the turn on again, and so on.
    Any idea whats going on? PCH dead? I measured cpu, gpu and pch mosfets - seems ok, no shorting. Any thoughts?
    Tags: None
    • mcplslg123
      Badcaps Legend
      • Jun 2015
      • 7262
      • india
      #2
      Re: Lenovo Y700-17ISK turn on and off

      Measure voltage on JEDP1 on the following pins.
      INVT_PWM
      LED_VDD
      DISPLOFF#
      LCD_VDD
      EDP_HPD

        Comment

        • pajdek
          New Member
          • Sep 2023
          • 4
          • Pol
          #3
          Re: Lenovo Y700-17ISK turn on and off

          Ok, thank you, will check it when i get home.

            Comment

            • pajdek
              New Member
              • Sep 2023
              • 4
              • Pol
              #4
              Re: Lenovo Y700-17ISK turn on and off

              Well nevermind, it just died, wont turn on anymore.
              LED_VDD was 1,8, rest 0.

                Comment

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