HP 455 G7 no display on battery

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  • ghedada.06
    Member
    • Feb 2023
    • 19
    • Algeria
    #1

    HP 455 G7 no display on battery

    Hi, i have HP 455 G7 came in for no display
    laptop model: HP 455 G7
    motherboard model: da0x9mmb8f0 REV: F
    this laptop turns on fine on charger, but when attempting to power it on battery (with charger unplugged) it shows no display with fan turning max speed. I did some measurements and i noticed that cpu voltages are missing on battery, after digging deeper in measuring i noticed that 1.8v is missing on pin #9 (APU_PG)
    ​i don’t know how can i trace this issue further, any help will be appreciated and thank you in advance
    Tags: None
    • fix122
      New Member
      • Apr 2025
      • 2
      • china
      #2
      There is an inductor PL9301 providing 1.8V next to the memory slot

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        • ghedada.06
          Member
          • Feb 2023
          • 19
          • Algeria
          #3
          It has 1.8v, i can measure 1.8v on APU_RST# also which is also connected to +1.8v_DEEP_SUS

            Comment

            • ghedada.06
              Member
              • Feb 2023
              • 19
              • Algeria
              #4
              You can see it here
              Attached Files

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