The exact reason is not known indeed. But here it is the possible solutions work for me: Unplug charger both from PC and from the wall plug. Leave it alone up to 1-2 hours until it is cooled and decharged entirely based some inside processors, capacitors etc. Finally, plug firstly to the wall and then to the PC. When plugging to the PC, you can attemt a little bit hard push. I don't know why but it generally worked for me. note: this answer was shared before at: Why my laptop some times showing pluged not charging

The exact reason is not known indeed. But here it is the possible solutions work for me: Unplug charger both from PC and from the wall plug. Leave it alone up to 1-2 hours until it is cooled and decharged entirely based some inside processors, capacitors etc. Finally, plug firstly to the wall and then to the PC. When plugging to the PC, you can attemt a little bit hard push. I don't know why but it generally worked for me.