This solution is the second step repair procedure before trying to replace the flex cable wire on it and
might help to solve also.
Nokia 7210s Earpiece Speaker PCB component
and line paths (earpiece speaker ways)
If these components is damaged, no matter how many times yo replace the flex cable wire will not solved the earpiece speaker failure issues. The chip resistor is has a value of zero ohms it means that the said resistor is fusible. You may check the continuity of both chip resistor and filter coil first before trying to install a new replacement flex cable wire on the device.