Lenovo T460 doesn't detect battery unless charger is connected
Texte:
I have a Lenovo T460 with a freakish problem. The 2 batteries, one internal and one external both aren't recognized by the system.
Windows shows that the adapter is plugged in but no battery is present (which is not the case since it's actually being powered from battery and no adapter is connected)
When I connect the adapter, windows now recognizes the batteries but removes the AC adapter indicator and doesn't charge the batteries (it acts as if I had removed the adapter and not connected it, as is the case)
System specs are :
Windows 10 pro with 8Gigs of RAM, an i5 processor 6th gen and a 500GB HDD...
Things I've tried:
Power resetting by pressing and holding power button.
Removing all batteries and trying them one by one (both batteries work whether individually or together, they both power up the system).
Uninstalling AC adapter and battery drivers and restarting.
Removing all components and connecting them one by one to isolate any faulty hardware.
Cleaning the board with isopropyl alcohol ( I am knowledgeable with working with electronics hardware so I didn't mess anything up.. surely).
All of the above had no effect whatsoever... It still behaves abnormally and doesn't cold start after I turn it off. No power reaction ( possibly because it thinks there's no battery when the adapter is not connected).
However I did note that pressing the system reset hole on the underside of the board ( there is a little button close to the internal battery) the system is able to start from cold boot but only if u press that reset switch....
I know a fair amount of software and hardware but this problem is a first for me.. any insights and suggestions would be appreciated.