IK Multimedia iLoud micro monitor issue

Hello everyones, I can’t hear the left and right woofers of the iLoud micro monitor. Also, the volume doesn’t change when I turn the volume dial, and the sound doesn’t go away even when I turn it all the way to the left. I’ve tried switching the three DSP switches in various ways, but I can’t feel any change in the tone.

When I connect a macbook or sampler, only the tweeter makes sound. If I turn up the volume of the equipment, the sound gets louder.

I took everything apart yesterday, and confirmed that the woofer speaker itself is not broken. The resistance was 3.6 ohms. What should I suspect before proceeding with the repair?

Thank you