HP16 DAG3MMB3AAO REV A No power on, no led charger

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • mon2
    Badcaps Legend
    • Dec 2019
    • 14035
    • Canada

    #21
    Remove all power. Measure the resistance from pin #4 (ACDRV) on the charger IC to the gate pins on each of the DCin mosfets (PQ8200, PQ8201, PQ8202). This should be ~4k ohms.

    Measure the resistance across the DCin mosfets (PQ8200 PQ8201 - they are in parallel so only one needs to be checked:

    source (1-2-3) & drain (5-6-7-8)
    source (1-2-3) & gate (4)
    gate (4) & drain (5-6-7-8) ; use resistance mode checking not diode mode for these tests


    Then repeat for PQ8202.

    Post each measurement.

    Comment

    • judamex
      Active Member
      • Jan 2021
      • 183
      • Mexico

      #22
      Originally posted by mon2
      Remove all power. Measure the resistance from pin #4 (ACDRV) on the charger IC to the gate pins on each of the DCin mosfets (PQ8200, PQ8201, PQ8202). This should be ~4k ohms.

      Measure the resistance across the DCin mosfets (PQ8200 PQ8201 - they are in parallel so only one needs to be checked:

      source (1-2-3) & drain (5-6-7-8)
      source (1-2-3) & gate (4)
      gate (4) & drain (5-6-7-8) ; use resistance mode checking not diode mode for these tests


      Then repeat for PQ8202.

      Post each measurement.
      For some reason, when I touched pin 4 of the PQ8202 MOSFET, it gave me pin 1, 2, and 3 readings for the PQ8200 and PQ8201 MOSFETs. When I removed it and applied power to the board, ACDRV magically appeared. The MOSFET on the outside gave me good readings. But just in case, I replaced it with an identical AONR32314, and everything works perfectly now.

      I really appreciate your help, and with that, I'll close this post.

      Comment

      Related Topics

      Collapse

      • flat-earther
        ASUS X54H laptop thinks it's always charging even with charger unplugged
        by flat-earther
        The charging indicator light on my ASUS X54H laptop is always on even when the charger is disconnected.

        Windows also shows ''Plugged in'' when charger is not connected.

        This problem started year ago gradually, when unplugging the charger the charging light took several seconds to disappear, then minutes, and now almost always on even when unplugged for an entire day.
        Strangely, before sometimes immediately when plugging in the charger the charging light went away, and later came back with it connected.
        If I let battery run out and say it has 3% Windows will...
        06-24-2025, 09:32 AM
      • motormayhem
        Lenovo T460 Only Charges on One Charger
        by motormayhem
        Laptop Question
        Hello,
        I'm working on a Lenovo T460 that has been having trouble charging as of late. Its worked well since I've owned it for a few years. When I went to use it the other day it was dead and wouldn't turn on (was sitting on an Anker 65W GaN charger). After some fiddling with the charger I got it to turn on and start charging, but seemed like the charger was not working as it should (took a few plug and unplug cycles to get it to start charging).

        A day later it was dead again and wouldn't boot/charge no matter what I did. No lights or anything when...
        05-12-2023, 01:46 PM
      • cind12
        GTX 1080 TI Gigabyte Aorus low resistance on vmem
        by cind12
        Hi guys, i was wondering, i've got 9Ohms on Vmem, one of the mosfet was shortet to ground, so i've desoldered hi and low mosfets nad still low res, then i removed all of the memory chips, and the resistance is still low, so did you had maybe a card with that low res on memories, and the card was working fine ?
        Removed the U1866Q and still without result, i dont have thermal cam so can't see where is hot spot when incjeting voltage.
        The resistance on core is ok 0.1Ohm ((Power 0.8V when on)
        Resistance on 12V 4K ohms (Power present when on)
        Resistance on 12V PEX 4K ohms...
        12-08-2023, 09:09 AM
      • Document Archive
        ISL88739AHRZ ISL88739 Laptop Battery Charger Datasheet
        by Document Archive
        The ISL88739 & ISL88739AHRZ are a highly versatile combo battery charger
        configurable for operating as either a Hybrid Power Boost (HPB)
        charger or a Narrow VDC (NVDC) charger, supporting 2-, 3-, or
        4-cell batteries. Both configurations allow the battery to work with
        the adapter together to supply the system load when it exceeds
        the adapter capability, referred to as system Turbo mode. HPB
        charger configuration reverse-boosts battery energy to the system
        bus to help the adapter provide the system power in Turbo mode.
        NVDC charger configuration...
        11-05-2024, 03:28 PM
      • Johndill
        Dell Inspiron 7567 LA-D993P odd charger issue
        by Johndill
        Hi, I have a Dell Inspiron 7567 LA-D993P that I've just got running.
        There was corrosion around PU1503 which shorted PC1518 & blew PL1504. (Reference pictures attached)
        I've replaced PC1518 & PL1504 & the laptop is now running however I now have another issue.

        Here are the tested scenarios:

        1. With the laptop running on battery, I plug in the 150W charger & the charger shuts off (no LED, protection mode) but the laptop remains running on battery.

        2. With the laptop off, plug in charger (LED says on) & the front charging...
        11-16-2022, 10:55 PM
      • Loading...
      • No more items.
      Working...