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Ideapad 320 No display, Processor getting hot, no cpu vcrore

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    #1

    Ideapad 320 No display, Processor getting hot, no cpu vcrore

    Device: Laptop
    Brand: Lenovo
    Model: Ideapad 320
    Board number: DG424/DG524 NM-B301
    Problem : No display, Processor getting hot

    +3VALW_P = PRESENT
    +5VALW_P = PRESENT
    PL302 = BATT+ = 0V
    PL3401 = +VNN = 0.9V
    PL703 = LX_VDDQ = 1.3V
    PL701 = 1.0V
    PL3301 = 0V
    KBRST#= 1.7V
    PM_SLP_S3# = 3.3V
    PM_SLP_S4# =3.3V
    PLT_RST# = 3.3V
    +3VL_EC=3.3V
    VR_CPU_PWROK =3.3V
    EC_RSMRST# =3.3V
    SYS_PWROK = 3.3V
    EC_RTCRST#_ON= 3.1V
    VR_VNN_PWROK =3.3V
    ACIN# 3.3V
    SYSON 3.3V VCORE_SW = 0V
    VCORE_HG = 0V
    VCORE_VCC=05V
    VCORE_EN = 1V
    VR_HOT# = 1.8V
    VCORE_VIN = 20V
    VCORE_REF = 0V

    Tried flashing clean me none
    cpuvcore resistance to gnd is 9ohms and decressing

    Remove power , and pump 800mv to cpu vcrore taking 1amp nothing getting Hot .

    How to comfirm is CPU dead or Bad or not functioining?
    Last edited by SMDFlea; 08-24-2023, 01:48 AM. Reason: Ideapad 320
    Tags: None
    #2
    Re: No display, Processor getting hot, no cpu vcrore

    What is the status of the following:
    PCH_PWR_EN
    EC_VR_ON
    1.8VALW
    2.5V
    VTT

    Probe PU701 deeply as often problem lies there.

    Comment

      #3
      Re: No display, Processor getting hot, no cpu vcrore

      Originally posted by mcplslg123 View Post
      What is the status of the following:
      PCH_PWR_EN
      EC_VR_ON
      1.8VALW
      2.5V
      VTT

      Probe PU701 deeply as often problem lies there.
      VTT- 0.6
      PCH_PWR_EN- 3.3v
      1.8valw - 1.8v
      cant find 2.5V?
      Code:
      1- EN_LDO2 - 3.3V
2 - FB_LDO2 - 0.7V
3 - LDO2 - 1.7V
4 - VIN_LDO2 - 3.3V
5 - VIN_LDO1 -0V
6- LDO1 - 0V
7- VIN_V1P0A_7 -5.0V
8 - VIN_V1P0A_8 -5.0V
9 - PMIC_EN - 3.3V
10 - VO_V1P0A - 1.0V
11- EN_V1P0A - 3.3V
12,13,14,15 - LX_V1P0A - 1.0V
16-EN_V1P8A - 3.3V
17,18- LX_V1P8A = 1.8V
19- VIN_V1P8A_19 = 5.0V
20- VO_V1P8A_20 = 1.8V
21- POK_V1P8A - 3.1
22- NC -0V
23- NC- 0V
24-T_ALERT_B - 3.1V
25-SDA - 3.3V
26 -SCL - 3.3V
27- VCC - 5V
28- VSYS - 20V
29 - EN_LDO1 - 3.3V
30 - CS_VDDQ - 1.8V
31 - EN_VDDQ - 3.3V
32 - BOOT_VDDQ - 5.7V
33- UGATE_VDDQ - 1.3V
34 - PHASE_VDDQ - 1.3V
35- LGATE_VDDQ -0.1V
36- EN_VTT - 3.3V
37- VSNS_VDDQ - 1.3V
38- VIN_VTT - 1.3V
39 - VTT -0.6V
40 - VSNS_VTT - 0.6V
      Last edited by SMDFlea; 08-24-2023, 01:49 AM.

      Comment

        #4
        Re: Ideapad 320 No display, Processor getting hot, no cpu vcrore

        Unit was returned , didnt fixed the laptop

        Comment

          #5
          Re: Ideapad 320 No display, Processor getting hot, no cpu vcrore

          aint that 1v on vcore_en too lov voltage?

          Comment

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