speakers make cracking noises after screen replacement

I had my htc one m8 screen repaired by a professional. After that the speakers started make cracking noises on playback even on calls. I think that the noise is produced by the top speaker. The headphones work great.I can't take it back for a repair cause i moved.

Is there anyone that knows an easy repair like reconecting the flex cables or something. Should i try replacing the top speaker? What causes the problem?