If ever tried and replace the speaker but the problem still there is no sound can be heard over the earpiece speaker on nokia 5610, the problem may lies on a faulty flex cable wire.
This solution shows the components that may need to check or replace before attempting to change or replace the flex cable, this components is composed of a filter coil and an ESD protection component.
Nokia 5610 Xpressmusic Earpiece Speaker problem Solution
1. Ensure that the speaker is working or try to replace a new one.
2. Check the components showed on the solution above, replace if found damaged
3. Replace the flex cable wire