12-19-2016 07:09 PM
I have a strage problem:
The problem could be caused by the ThinkPad BIOS Update - 7 (V.220.127.116.11) I did a few days ago. I'm not sure though and I have no idea how to undo the update.
Odiously neither the power adapter nor the battery are causing the problem.
12-27-2016 01:37 PM
I have never taken that model apart to examine the battery circuit, but other thinkpads have a 0.5a fuse near the battery connector that passes charging current. A blown fuse will cause those symptoms.