dell N5040 volts on any pin on PWBTN1

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • hamdykl
    New Member
    • Oct 2021
    • 4
    • egypt

    #1

    dell N5040 volts on any pin on PWBTN1

    dv15 cp uma mb 10263-1
    i need a help. i have dell 5040 this laptop working fine when i remove RC battery. but not responding to power batten and no volts on any pin on PWBTN1
  • mcplslg123
    Badcaps Legend
    • Jun 2015
    • 7262
    • india

    #2
    Re: dell N5040 volts on any pin on PWBTN1

    Check RTCRST# and SRTCRST# voltage. No power should be attached to mb(adapter+battery removed), only 3V cmos cell inserted.

    Comment

    • hamdykl
      New Member
      • Oct 2021
      • 4
      • egypt

      #3
      Re: dell N5040 volts on any pin on PWBTN1

      i did it and there are 3V on R2421 & R2420 (only RTC battery)
      Attached Files

      Comment

      Related Topics

      Collapse

      • BTubbs200
        Dead Dell Latitude 5420 not receiving 20 volts from USB-C charger
        by BTubbs200
        Hello,

        Dell Latitude 5420 P137G
        Board: LA-K491P REV A01

        I have received this laptop which was described as "does not power on or accept charge." Battery shows no sign of charging when charger is plugged in, nor does the board show any signs of life when battery is unplugged and charger is plugged in. No light from the LED at all or any other indications of activity.

        Board seems to have no shorts, all power rails are fine and show high resistance.

        When charger is plugged in, voltage is present in 3.3V rail but absent in others....
        01-24-2025, 08:15 PM
      • Akhlz001
        Dell Pro 13 Plus PB13250 Bios Unlock
        by Akhlz001
        Hi,

        Could someone help trying to unlock this BIOS, seems that Dell have changed the layout of new Dell Pro 8FC8 bioses from checking HXD - 4000 bits do not need changing, only 2000. However after FF the section starting from '01000' upto 2000 bits and then soldering the chip back it seems that the microchip on the motherboard is recovering the bios back to original settings after first boot. Has anyone found a way to crack this extra layer of security Dell have implemented? Seems both HP and Dell have upped bios security to match Lenovo by implementing extra measures on a separate...
        09-20-2025, 07:15 PM
      • master3112
        Dell Inspiron 5590 Board 18778-1 no charging, charging not possible
        by master3112
        I would like to share my experience about charging issues with Dell power supplies with the tech community. I am working on a Dell Inspiron 5590, Mainboard 18778-1 with charging problems. The device can be switched on and works so far, only the message appears at startup:

        Alert! The AC power adapter wattage and Type cannot be determined. The battery may not change. The System will adjust the performace to match the power available.

        The power supply unit is not recognized in the Bios and the charging process is set to "idle". I use original Dell battery, type...
        07-29-2025, 01:55 PM
      • SMDFlea
        Dell Thunderbolt Firmware
        by SMDFlea
        Dell thunderbolt firmware, extracted from dell firmware update exe. Padded to 1MB.

        Some models have a choice of 2 different firmwares, it depends on the dell SKU.
        The SKU is in brackets (****)

        EDIT: NVM65...
        01-26-2025, 06:22 AM
      • F R 2568
        Dell Latitude 5420 does not start (no post) need help to find the reason why
        by F R 2568
        Hello all,

        this is my first post, so if I make mistakes please do not hesitate to point them out, thank you in advance.

        I got a Dell Latitude 5420 (Service Tag: 7RFM6D3, Motherboard: GDF40 LA-491P Rev.: 2.0 (A01)) which does not start and I want to repair it. These are the symptoms:

        If the laptop is only connected to the AC adapter (battery removed):

        When I press the power button, the keyboard backlight and the display backlight are turning on. Caps key light is lightning, but key does not respond to pressing it.

        The power/battery...
        01-08-2025, 05:45 AM
      • Loading...
      • No more items.
      Working...