@maximebequet this could possibly be an issue with the power management IC or other components on your main board. You will need some the schematic and board view (as well as some decent tools and the ability to test circuits etc.) of your main board to determine this.
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It is also possible that the charging cable shortens out the charging board (sub board) Replace that first and see what happens. Here is the guide for the task. The cost for the board is not very high and it is readily available at many online places.
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It is also possible that the charging cable shortens out the charging board (sub board) Replace that first and see what happens. Here is the guide for the task https://www.ifixit.com/Guide/Samsung+Galaxy+S21+Daughterboard+Replacement/148688 . The cost for the board is not very high and it is readily available at many online places.
@maximebequet this could possibly be an issue with the power management IC or other components on your main board. You will need some the schematic and board view (as well as some decent tools and the ability to test circuits etc.) of your main board to determine this.
It is also possible that the charging cable shortens out the charging board (sub board) Replace that first and see what happens. Here is the guide for the task. The cost for the board is not very high and it is readily available at many online places.