The first step that should be done is to check speakers themselves, if the speaker issues a small voice, the speaker can be sure there is a dirt hole, try to clean it., to clean it does not resolve the issue try the next step.
The second step try changing the speaker, if the speaker is certain that the cause of the problem, simply by replacing the speaker has a problem could be solved, if it does not work out try the next step.
The third step try to check the speaker lines as shown below, check one by one lane and a resistor connecting the speaker lines, if there is a path-breaking try doing jumpers with caution and care.
Nokia Lumia 530 Ear speaker jumper ways
Hints on repairing Lumia 530 not working ear speaker problem:
1. Check the Receiver speaker terminals if not misaligned and or damaged then test it using a multi-meter, replace if found damaged.
2. Clean the ear speaker terminal contact pads on the PCB board.
3. Check/ replace the filter coils and capacitors.
4. Trace the speaker connection paths from the filter coils down to the PCB terminal pads.
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