lenovo t490 incorrect charger attached help

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • zomi
    Badcaps Veteran
    • Nov 2011
    • 505
    #1

    lenovo t490 incorrect charger attached help

    came as a dead board
    would only power on battery
    found a shorted cap and replaced.( marked in red)
    i have found I am mising 20v on the mosfets.. (marked in red)
    I only have 5v across these

    bit stuck where to go from here

    the error message is

    The connected AC adapter has a lower wattage than the recommended mode

    shows up as 15w charger in windows

    its a strange thunder bolt issue i think, the shorted cap threw me a bit.

    schematics are here https://www.badcaps.net/forum/showthread.php?p=1146770
    Last edited by Vesko356; 08-08-2023, 04:50 PM. Reason: Posts merged.
    Tags: None
    • zomi
      Badcaps Veteran
      • Nov 2011
      • 505
      #2
      Re: lenovo t490 incorrect charger attached help

      Flashed with thunderbolt firmware all good now
      have 20v will test in machine shortly

      all sorted now this one is working now.
      Last edited by Vesko356; 08-08-2023, 04:51 PM. Reason: Posts merged.

        Comment

        Previous template Next

        Related Topics

        Collapse
        • 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
        • Document Archive
          Lenovo ThinkPad T490 Notebook T Specification for Upgrade or Repair
          by Document Archive
          This specification for the Lenovo ThinkPad T490 Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the T490 boardview and T490 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for Lenovo ThinkPad...
          09-06-2024, 04:10 PM
        • Document Archive
          Lenovo ThinkPad T490 Notebook T Specification for Upgrade or Repair
          by Document Archive
          This specification for the Lenovo ThinkPad T490 Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the T490 boardview and T490 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for Lenovo ThinkPad...
          09-06-2024, 03:30 PM
        • Document Archive
          Lenovo ThinkPad T490 Notebook T Specification for Upgrade or Repair
          by Document Archive
          This specification for the Lenovo ThinkPad T490 Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the T490 boardview and T490 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for Lenovo ThinkPad...
          09-06-2024, 03:30 PM
        • Document Archive
          Lenovo ThinkPad T490 Notebook T Specification for Upgrade or Repair
          by Document Archive
          This specification for the Lenovo ThinkPad T490 Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the T490 boardview and T490 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for Lenovo ThinkPad...
          09-06-2024, 03:30 PM
        • Loading...
        • No more items.
        Working...