Nokia 2 microphone not work

[Armkar]

Good time of day, brought a Nokia 2 after the water does not work the microphone, did not find obvious traces of corrosion, replaced the microphone, but did not help, but noticed that when I connect the flex cable from the main board to the bottom board, where the microphone, then one of the microphone points goes to short circuit with the ground and when I disconnect the flex, the short-circuit disappears, I understand that the short-circuit comes from the main board, I found a point in the connector that go to the corresponding point to microphone and as expected on the main board, this leg goes to the short-circuit. The fact is that the leg goes from the connector into the depths. to the board and since now he is in short circuit with the ground, I can’t call where it goes, the circuit is not where there is,
If anyone have such a device at hand, please check where this leg goes, and if possible check microphone way

Thank you in advance