Edifier monitors, blown amp?

[balboni20]

Hello, I have a Edifier R1800T III system that has gone bad.
One day I got no more mids and lows, only the tweeters were working.
Upon inspection 2 capacitors are blown on the board, I replaced those but the problem persists! Do you have any ideea what could I check? The channel that leads to the tweeter is working, the one that leads to the mid/low speaker is not!

 

[Bluejets]

Cap in the first photo looks a bit sick.....

 

[balboni20]

Yes, that was replaced, you can see in the second picture the 2 big blue capaitors are the new ones

 

[balboni20]

I am attaching some other pictures that I have,
1 pic are the replaced capacitors
2 and 3 pics are the power supply

 

[balboni20]

Looking at the pictures myself I am seeing something like a yellowish liquid on top of another cap, that I haven't noticed before, And it is right next to the connector that goes to the mid/lows speaker,
What do you think that is? A leaky cap? I will inspect it when I get home!

 

[balboni20]

I have cheeked that capacitor, the yellowish substance is hard, its like a glue, maybe from the manufacturing process?
Or is this electrolyte? Is it supposed to harden?

 

[balboni20]

I have added a closeup photo with the capacitor