Dell e7480 Laptop cannot start with batery connected

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • Askic
    Senior Member
    • Sep 2018
    • 187
    • BIH
    #1

    Dell e7480 Laptop cannot start with batery connected

    Hello guys,
    I have a relitvely new laptop with a motherboard problem. It is Dell e7480 and there is no schematics for it.
    Laptop cannot start and doesn't show any signs of life. But when baterry is disconnected from the mainboard, laptop starts normally and works OK.

    Does this mean that problem is located in a very close proximity of charger IC?
    Battery is good. Did you have any similar experience? On the motherboard, there is evidence that something was burnt.

    Thank you.
    Attached Files
    Tags: None
    • SMDFlea
      Super Moderator
      • Jan 2018
      • 20898
      • UK
      #2
      Re: Laptop cannot start with batery connected

      A schematic and boardview is available on some paid sites. If you make a request in the "Schematic requests ONLY!" section someone might post it - https://www.badcaps.net/forum/forumdisplay.php?f=41
      It looks like its had a little liquid damage in that area .
      All donations to badcaps are welcome, click on this link to donate. Thanks to all supporters

        Comment

        • darrkoo
          Member
          • Feb 2015
          • 44
          • Poland
          #3
          Re: Laptop cannot start with batery connected

          Hi
          Elements to be replaced:
          L902 - 0.82uH
          hibrid mfet pq904, pq905 - AON6992

            Comment

            Previous template Next

            Related Topics

            Collapse
            • Bowline
              Dell E6400 PT434 type Battery Charging Stuck at 1%. Battery Pinouts?
              by Bowline
              My question pertains to understanding the control circuity inside a Dell PT434 type battery used in Dell E6400, E6410 and other Dell notebooks?

              Does anyone have a circuit diagram for the inside of a Dell PT434 battery and/or a description of how the control lines work to control this battery?

              My reason for asking is I have a battery which I cannot get to charge beyond 1% in a Dell E6410 or E6400.
              The LED bar graph charge indicator on the battery shows one LED lighted when the info button is pressed.
              I have tried multiple different Dell power adapters. My Dell...
              06-11-2025, 10:13 AM
            • Document Archive
              DELL Latitude 7480 E7480 Laptop Boardview
              by Document Archive
              DELL Latitude 7480 E7480 Laptop Boardview
              LA-E132P CAZ20...
              10-26-2024, 03:29 AM
            • diamon
              Looking for Dell Latitude 5520 / 5530 / 5540 RJ45 network connector replacement
              by diamon
              I have a Dell Latitude 5530 with a damaged RJ45 network connector. See the attached pictures.

              Have already searched on Farnell / Aliexpress / Ebay and had contact with several suppliers on Aliexpress and Ebay, but they cannot deliver this connector.
              Is there someone inside the EU, who has these connector(s) or perhaps defective motherboard(s) for these laptop models I have mentioned in the topic title.

              Pictures of these boards:
              Dell Latitude 5520 https://www.ebay.com/itm/256052956663
              Dell Latitude 5530 https://www.ebay.com/itm/125844181534
              Dell...
              4 Photos
              02-28-2024, 12:51 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
            • OntarioTL
              Dell 5410 greyed out BT
              by OntarioTL
              Well I've learned something new today. Of all the Dell laptops I've come across I have never seen bluetooth greyed out, and only to learn this is during the build from Dell factory. I've tried to pull the original BIOS and fix with another dell with the same issue on the forums, however the original was not recovered from the forum upgrade so I cannot do a comparison to attempt the fix on my own.

              If someone could help me out with this unit and I'll try the next one as so far I have 2 on my desk with this issue. Thanks in advance!

              Dell Lattitude 5410
              Service Tag...
              07-25-2025, 01:28 PM
            • Loading...
            • No more items.
            Working...