A customer noticed that while using the HDC202-X24, a faint “whining” sound occurred when charging their laptop via the device’s USB-C port. Interestingly, this sound only appeared when powering the laptop through the KVM; using the laptop’s original charger produced no noise.
Although the device was functioning correctly, the persistent sound affected the user’s perception of a quiet work environment, especially during long hours of use.
Analyzing the cause We investigated the customer’s setup and power delivery behavior. When the HDC202-X24 provides PD charging via USB-C, different laptops request varying voltage and current combinations according to their internal charging strategies. Under certain load conditions, inductive components within the device’s power circuit can vibrate slightly, producing an audible whine.
This phenomenon is not uncommon among PD chargers, docks, and USB-C charging devices, but whether it is noticeable depends on the specific laptop and environmental conditions.
Providing a practical solution After confirming the cause, we recommended a simple workaround to the customer: use the laptop’s original power adapter for charging while maintaining video and data connections through the KVM. This approach eliminates the sound entirely without impacting the device’s core functionality.
Turning feedback into product improvement This feedback also prompted us to reevaluate the device’s behavior under power delivery scenarios. Although the HDC202-X24 met design specifications, we began exploring optimizations to reduce potential noise under specific loads. Going forward, power stability and acoustic performance will become explicit design priorities in future product development.
This experience reminded us that product quality is not only about whether it functions correctly but also about whether it performs quietly and stably over extended use. Real user feedback helped us focus on a subtle yet impactful aspect of the power delivery experience.
