So this sounds like being a general filter problem in your phone. Therefore are so called resonant circuits in place. Often in the close vicinity of (aux) sockets such as for e.g.headphones.
They can sometimes blow if too much static voltage is given by e.g. connecting (as once happened to my 24bit pc audio cards input socket)
I would suspect the top module with the headphone socket to be damaged. Maybe you have some fairphoneangels close to you for testing another module.
That’s my idea.
3 Likes