A while back I think I may have plugged the wrong power adapter into my MIDI keyboard and it started to smoke and then never turned on again.
So... I popped it open and it looks like it's a burnt 1N5187 diode.
I come from the completely different world of stats and maths stack exchange so I'm not really qualified to speak on these things and I have little training in electrical engineering and hardware.
But I have taken a class in soldering and so I came here to learn from anyone willing to advise whether you would recommend for/against me getting a soldering iron to replace it if I bought the right part and isopropyl-ed the affected area with a q-tip (assuming I'm a beginner).
Also, I'd like to understand what role this diode plays in the circuit. Just by looking at it, does it seem like the burnt areas would inhibit the flow even if the diode was replaced.
Any commentary, links, or help from experts is greatly appreciated. Main goal here is to learn more about how these things work.
EDIT: Adding image of the the other side of the circuit board.