Keyboard battery not charging

Hey. I’m not sure what you mean by gpu,but as long as the surface tablet works fine,you can probably get a new keyboard. It’s really down to the possibility of a power management issue in the keyboard. This can be a loose connection somewhere,a damaged component,etc. You may want to look into buying another keyboard for it.

As an electrical engineer i am trying to hunt down a similar problem. i have an undesirable voltage on my battery cells and my laptop charger is not propagating through the board. so i am trying to go through the chips to make sure things are turning on but some how 15V is creating a 3.3V rail. but my input protection mosfets are not turning on to allow the 15V to go to the battery charger.

Ok I have the same issue that the keyboard stopped working, so (don't laugh) I pulled the keyboard of the surface, spit on the terminals and rubbed very hard to kind of clean them, and walla my keyboard now works.... :-) Hope this works for others its worth a go...