Key not working (Xbox360)

[u/Gabrymost01]

I recently bought this Keyboard, made exclusively for the videogame Rockband 3. This is the Xbox 360 version.

Every key works normally, except for the up arrow of the D-pad (the top left key in the first picture).

I tried disassembling it and cleaning the contact with alcohol, but nothing changed. The circuit looks intact to me, I don't know why this key still's not working.

Is there something else I can try?