- The speakerphone may be faulty.
- Small, distorted sound often occurs when there is dust on the speaker grilles.
- The coils may be faulty.
- There is no continuity between the contacts and the speaker coil.
- Speaker board contact problem.
Solution to repair Samsung Galaxy A20 phones that have lost speakers
Test speakers with a multimeter, replace if damaged. Distorted sound is caused by weak speakers or damaged internal coils.
If the speaker is good and there are no problems, make sure that the contact is not misaligned. Then, clean the speaker contacts to avoid oxidation.
Check each corresponding buzzer + and buzzer - connection paths to each component where it is being connected.
If any buzzer + or - is missing then create a jumper.