My Lenovo Z-series 51-70 laptop doesn't charge the battery all the time (sometimes it does, sometimes it does not). After long periods of leaving it unplugged and turning the laptop completely off, it will charge again, mostly for short periods, and never as long as is needed to fully charge the battery.
It is almost as if something is overheating and needs to cool again. To that end, here are some of the things I have tried to resolve the issue:
I've put the laptop in the freezer for 15 mins but no joy there. That was the first thing I tried.
I replaced the DC jack (inside) less than two years ago.
I replaced the battery but that didn't work. It turns out that the old battery works fine.
The AC adaptor is only 18 months old, plus I took the laptop to a store and it showed that the laptop charged using their charger, but alas, it charged with my charger as well. After I got home, the laptop stopped charging.
If my AC adaptor charger is still working, two things need to be shown:
#1: When the laptop is in charging mode, both chargers should charge the laptop.
#2: When the laptop is in a NON-charging mode, both chargers should not charge the laptop.
I have proven case #1, not case #2.
This brings me to the Peculiarity: If the battery is removed, but it's still hooked up to the AC, the laptop doesn't go on. Unless that's a feature of post 2015 laptops, (that they won't run without a battery), even if they receive power. Before, I was leaning towards the battery being the culprit, but now I'm thinking it's the motherboard.
My questions are as follows:
- Is the cause of the intermittent charging most likely to be found with a faulty motherboard?
- Will replacing the motherboard fix the issue?
- Could it be the BIOS?
Thanks
PS. this is NOT the well known 'plugged in, 'not charging' issue that many talk about.