Solution plugged in not charging Solution for me

I had the same problem as many others in the bios the adapter was not recognized, I tried most of the solutions people had posted nothing worked. Then when trying the unplug battery and hold power button for 20 seconds I noticed that 2 of the pins that the battery plugs into were touching I pulled them apart made sure the battery plugged in easily and hey presto all was well. I hope this helps someone else.

Richard