Send it t an MTH tech for repair. Not trying to doubt anyone's skills but this is a slightly tricky soldering job and requires testing and repair knowledge to fix. There are several topics, some recent on the details of signal generation testing, soldering, and so forth.
Example very recent topic alking about soldering the ACT244 ICs which are one of the possible failure modes of a DCS channel and weak or no DCS sgnal https://ogrforum.ogaugerr.com/...-on-act244-placement
Another TIU weak signal topic https://ogrforum.ogaugerr.com/...-dcs-signal-from-tiu