Hi MinShih,
What is your complete model number, Lenovo ThinkPad X1 is a family of products?
Is this computer new?
Have you checked there is no dusk build up between the power cord, charger, and the computer where it plugs in?
Does the charger have an LED light on it to tell you it has power?
Have you tried a different power outlet on the wall?
Have you removed the battery from the laptop and checked everything is OK in there?
If it was not charging, why did you leave it in that stat until it ran out?
The model number of my X1 is “type 20KG-0022US”. It is a 6th generation Thinkpad X1 Carbon which was bought 3 years ago.
When it is charging, the light next to the connector will come up. But, it has not come up since I upgraded it 2 days ago. My wife took it to a lunch party to play some music and the battery was drained completely.
The battery in this laptop is not removable. At least, it is not user removable. So, I am stuck here. I have tried several wall outlets but in vain. I only have one charger and it had worked very well until I upgraded to Windows11.
Min Shih