Complicated E5550, have psid, charger not recognized, wlan and two usb's not working

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  • flatline
    Member
    • Apr 2019
    • 23
    • united states

    #1

    Complicated E5550, have psid, charger not recognized, wlan and two usb's not working

    Dell e5550 (LA-A913P).

    Loaded and ran windows fine. Laptop runs fine except for a few things.

    Wifi card not recognized

    Charger not recognized, Have PSID 3.2v at connector. Will run off battery fine.

    USB1 and USB2 Ports not working/no power. (USB3 port works and loaded windows onto sata drive.)


    (PU1) I decided to jump pin3 to pin4 (psid) and charger was recognized and charged the battery.

    But this does not help my wifi and usb ports. It's not the wifi card and the usb ports look fine.

    Also, The power button works as it should, but the little led on the power button doesn't light up, which I find interesting.
    Attached Files
  • KvnTM
    Badcaps Veteran
    • May 2018
    • 434
    • Germany

    #2
    Re: Complicated E5550, have psid, charger not recognized, wlan and two usb's not work

    Is 5V Present on the non working USB ports?

    Things to measure:
    Wlan:
    JNGFF1:
    - +3.3V_WLAN
    - WLAN_WIGIG60GHZ_DIS#_R
    - BT_RADIO_DIS#_R


    USB:
    +5V_ALW
    JUSB1:
    - VBUS
    - If VBUS not present: UI1 USB_PWR_EN1#, +USB_LEFT_PWR

    JUSB2:
    - VBUS
    - If VBUS not present: UI2 USB_PWR_EN2#, +USB_RIGHT_PWR


    LED (Assuming LED is named Breath LED in schematic):
    UE2:
    - BREATH_LED#

    JLED1:
    - BREATH_WHITE_LED#

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