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United Kingdom of Great Britain and Northern Ireland

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  • Posts: 2
  • Registered: ‎06-26-2019
  • Location: United Kingdom of Great Britain and Northern Ireland
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  • Message 1 of 2

rebuilt old Thinkpad L440, shutsdown when i plugin battery

2019-06-26, 8:46 AM


just refurbished an old Thinkpad L440 but when i switch it on and boot windows with battery, it shuts off after reaching the desktop and the power button light flashes a few times.


it also refuses to power up when i put the laptop in the dock with battery plugged in, if i remove the battery it powers up.

also boots to desktop and runs fine without battery.


could it be a motherboard fault? i have two batteries one old and one brand new, both lenovo genuine.


i don't have the original psu but found a slim tip 230w lenovo psu on ebay and have been using that, do i need a lower wattage psu? might that be the cause? i also purchased another motherboard. i have since checked online the psu specs and the 65w, 90w and the 120w psu are all 20v just like the 230w.





fhd matte screen

i7 4910mq (temps are fine)

16gb ddr3l

120gb m.2

128gb ssd

500gb hdd in optical bay

intel wifi


459 Posts


United States of America

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7862 Page Views

  • Posts: 459
  • Registered: ‎05-02-2019
  • Location: United States of America
  • Views: 7862
  • Message 2 of 2

Re: rebuilt old Thinkpad L440, shutsdown when i plugin battery

2020-01-21, 15:39 PM

Hi !


Welcome to Lenovo Community Forums.


Are you still experiencing the same problem? Sorry for the late response.


Could you try to Enable the Power On with AC Attach in BIOS utility settings and observe if you'll see any changes?



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