Chosen Solution

Hi, today one of what I think was a fuse have burned down, the macbook still works like always, searching I have found that on top of that fuse there was the letters “Jā”, so I have search for it but with no results, I want to know what is that for and If I can still use the computer that way.

Here is an image if the fuse (from here) that burned down

thereaper12 that is not a fuse. That is reference designator C6603 which is a 100UF 6.3V 20% Tantalum capacitor in a Case-AL1 package. It is parts of your speaker amp circuitry. Always remember that there is a reason why components fail. So determine that before you replace it.