Some materials related, how to fix not charging device, spare detailes 
https://www.youtube.com/watch?v=eEZJ8NvzD9Y
https://www.ifixit.com/Guide/Lenovo+Thinkpad+X1+Carbon+4th+Gen+Motherboard+Replacement/137017
https://pcsupport.lenovo.com/nl/en/products/laptops-and-netbooks/thinkpad-x-series-laptops/thinkpad-x1-carbon-type-20fb-20fc/20fb/documentation/doc_userguide
https://download.lenovo.com/pccbbs/mobiles_pdf/x1_carbon_hmm_en_0b48811_05.pdf
https://www.ebay.co.uk/itm/L....
https://www.ebay.co.uk/itm/203780738929?hash=item2f72474f71:g:K5oAAOSwVZRh1FiQ#viTabs_0
https://www.ebay.co.uk/itm/133936410806?hash=item1f2f3b70b6:g:HzQAAOSwgsxhk4YU