Hello Walter Stocker ,
As you explained in the question I guess the fault occur from power management module. Replacing USB interface doesn’t make sense & won’t fix the heating issue. If you have good BGA reworking skills you can replace the PM ic which cost less than 10 USD
Chip function : Main power management module
Chip ID : MAX77686
Can get the chip from donor board : yes : i9300 (Samsung galaxy S3) also having same chip
Where can buy : [https://www.parts4repair.com/max77686-power-ic-for-samsung-galaxy-note-ii-n7100/|parts 4 repair] [http://www.ebay.com/itm/Small-Power-ic-MAX77693-For-samsung-i9300-N7100-Repair-/182038422216?hash=item2a6255e2c8:g:zI8AAOSwKtVW0zXr|ebay] [http://www.aliexpress.com/item/1PCS-LOT-MAX77686-FREE-SHIPPING-NEW-ORIGINAL-for-Samsung-Galaxy-S-III-S3-i9300-N7100-big/32583163471.html?spm=2114.01010208.3.2.T731a1&ws_ab_test=searchweb201556_8,searchweb201602_2_10037_10017_405_301_507_10033_406_10032,searchweb201603_7&btsid=edadcbd8-dd56-4607-a5f7-f2b445df1489|aliexpress]
Cheers!