Power Issue on HP AHL50/ABL52 LA-C701P Motherboard - UEFI Chip Not Powered

Collapse
X
Collapse
 
  • Page of 3
  • Time
  • Show
Clear All
new posts
Previous 1 2 3 template Next
  • Christian0734
    Senior Member
    • Nov 2020
    • 92
    • France
    #41
    Re: Power Issue on HP AHL50/ABL52 LA-C701P Motherboard - UEFI Chip Not Powered

    Originally posted by mcplslg123
    No point replacing PU2 unless the low resistance to GND reading is fixed on PL8. Simply another IC will go waste.
    I've already ordered PWM Controller it will be useful for another board...


    Originally posted by mcplslg123
    Remove PC43 and check resistance to GND on consumer side of PL8-is it same?

    On PC43, on the PQ8 and PQ7 side, I'm grounded, on the other side, there are 50 ohms.

      Comment

      • EugenF
        New Member
        • Feb 2024
        • 1
        • Austria
        #42
        @Christian0734​ I have the same defect on the same AHL50 motherboard. Did you solved the power issue ? Did you replaced PU2 ?

          Comment

          Previous 1 2 3 template Next

          Related Topics

          Collapse
          • mzk10k
            AHL50/abl52 LAC710p - ac120ns no power with battery connected
            by mzk10k
            Hello

            I have model AHL50/abl52 LAC710p - ac120ns. It doesn't turn on after connecting the battery. The battery is charging correctly. I remove the battery, restart the bios by pressing the start button for 30 seconds without a charger and it works. I connect the battery, press the start button and it does nothing.
            When it is on and I connect the battery, I reset it and it works and detects the battery.
            I have measured some voltages according to the schematic and they are correct.​
            Can the BIOS be corrupted?...
            05-31-2024, 11:37 AM
          • Zilicon
            AHL50/ ABL52 LA-C701P Rev:1.0 Turns on but turned off after few seconds
            by Zilicon
            Hearty greetings to everyone, trust you all are doing excellently well.

            Please, I have the above problem, the laptop turned on after the switch was activated but it will turns off in less than 2 seconds.

            The power stables in very rare case. Once it was stabled, everything works fine.

            Once the power switched is pressed, 5V and 3V were present.

            The things i have done:

            1. I have check for shorts on the board, but nothing. The board is short free

            2. Not a power switch problem, it behaves the same without the switch ...
            06-10-2024, 05:05 AM
          • GuiTi
            Need Custom BIOS (UEFI/Dualboot) for Lenovo Chromebook 100e Gen 3
            by GuiTi
            Hey everyone!
            I need help with my Lenovo Chromebook 100e Gen 3.
            Here are the details:
            • Motherboard: LA-L131P
            • MFG Date: 2022/01/07
            • MTM: 82J80001BR
            • MO: MPNXB2103001
            • Factory ID: LI123

            I bought a new Winbond 25Q128FVSG chip.
            The chip currently on the board is the same model but with different ending letters.
            I can’t use the CH341 clip on the chip that’s on the board because it’s too low-profile and doesn’t make proper contact.

            The Chromebook is Google account locked, and I’ve already tried everything.
            I understand that I need to replace or...
            10-14-2025, 08:41 AM
          • EvazX
            ASUS ROG G513QY – RX 6800M powered but not detected intermittently + random crashes (Motherboard: 6050A3254002-MB-Axx)
            by EvazX
            Hello everyone,

            I am working on an ASUS ROG G513QY laptop with RX 6800M dGPU.
            Originally, this laptop was completely non-functional. I replaced the motherboard (part number 6050A3254002-MB-Axx), and with the replacement board it started working fine.

            For a long time, the dGPU worked perfectly stable. I played several hundred hours on very demanding games such as Cyberpunk 2077 without any crashes, instability, or detection issues. Performance was excellent and there were no warning signs of failure.

            However, after some time, the replacement motherboard...
            08-25-2025, 06:09 PM
          • ramrk
            hp AHL50/ABL52 LA-C701P bios request
            by ramrk
            hi, i need bios for hp 15-ac122tu
            MB Model : AHL50/ABL52 LA-C701P REV 1.0
            02-18-2021, 11:03 PM
          • Loading...
          • No more items.
          Working...