As @mayer pointed out that Logic Board you show in the picture looks like it is toast. Waste of time trying to repair it because other things may also be damaged. It’s simply just a wild goose chase. If you want this computer operational again I would simply get a new Logic Board.
[product|IF185-034]
[guide|498]
You will need to re-apply thermal paste too if you decide that you will buy the new Logic Board.
[guide|744]
[product|IF179-023]
[product|IF179-010]