I have a Lenovo G40-70. Windows 10 Home. I bought it as new in 2017; I keep it running 24-7. The problems started with the battery not charging. I disconnected it for the night, leaving the battery inside. The next day it charged again to 100%. I used the laptop all day long and around 2 AM it refused to charge, the battery depleted and died again. I disconnected it again. Next day, upon plugging in, it charged again to 100%.
Last night it stopped charging again. I disconnected it again, but now the battery does NOT charge to 100%, it just sits at 0%, but as you can see, I can still use it.
After a down time of 15 hours, the battery charges again
Question: So should I replace the battery or the AC cord and AC adapter?
- Most laptops function without the battery, just as long the AC is plugged in. But here, when all is in a non-charging situation, taking the battery out immediately kills the laptop.
- The Lenovo Vantage App says the battery is in good condition.
What I tried to fix it:
- Replaced the AC cable. But charging or not charging, this made no difference either way.
- Opened up the laptop and checked the Power Jack Dock Connector Flex cable. But it was okay.