Great thanks! I was able to solder it back on with a soldering gun I bought this morning. A lot cheaper than buying a new mother board, hehe. Charging seems to work completely fine now, nothing else seems to be damaged too (exept a small part of plastic from the inner casing which doesn't matter )

Firstly sorry for bringing up a topic that's almost a year old but it is just too similar to my problem - my T23 is just not charging and the problem is not the battery (I have made this sure). Today I dismounted the keyboard to see if some components are loose as described in this thread above. And...