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Microphone doesn't pick up any sound

I bought a second hand pair of Hyperx Cloud Alpha headphones. First thing that I observed was, the microphone wasn't picking any sound.

I tried different types of solutions online but with no result.

I plugged the microphone directly into the microphone jack and it worked. After that I verified if the microphone line on the cable was continuous, it was.

In the end I took apart the headphones and found this:

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There wasn't any resistor where it's showing on the board, the question is, does someone know the value of that resistor?

Or if a dirrect connection will work without affecting the microphone/headphones.

Edit:

These are the photos for the pcb backside:

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3 Comments:

HI, Quite often there are empty slots on the PCBs for components, so it is likely that there was never a resistor there. On the other hand these connections are just for the left/right speaker. Are the wires for the microphone soldered on the other side of this PCB? Might worth checking those to see if they were soldered on properly...

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@honakrisi what you said 👍 looks like no resistor was ever fitted.

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@honakrisi It's a possibility, but on the other side of the pcb there's no wire/ trace connecting the microphone jack to the main jack of the headphones.

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