Hints in repairing Nokia C7 ear speaker problem:
1. Visually check the earpiece speaker for possible damaged, like misaligned terminals.
2. Clean the speaker terminal contact pads on the flex cable.
3.Check the earpiece speaker using a multimeter, replace if damaged.
4. Check the flex ribbon cable for possible damaged, try replacing it.
5. Clean the flex pin connector if oxidized.
6. Check/replace resistors and capacitors near the pin connector.
This are the basic repair procedures only. The high level solution will be posted for update
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