Your friend has soldered it in the wrong orientation. The sloped edge should have faced upward (toward the SD slot) in the picture, but it is not. My guess is the chip has likely burnt out, better order a new one and hopefully no other hidden damage that will render the X3 unrepairable.
I've bought the new component (the exact same model) and we've soldered it in the right direction.
Unfortunately, when I play a song and I plug the headphones, I can hear "TAC" sound from the player and then, after maybe 2 seconds, another from the headphones, and it gives me the message: "Output error Please reinsert earphones".
I specify that the music works from the LINE OUT.