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LED Status Indicators

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Toby Chui edited this page Mar 14, 2026 · 1 revision

DezKVM-Go includes two onboard LEDs that provide basic status information about the device.

These LEDs are intended as simple diagnostic indicators during normal operation.

Power LED (White)

Color: White
Function: Power indicator

Behavior:

  • ON – The device is receiving power.
  • OFF – The device is not powered.

This LED does not blink or indicate system activity. Its sole purpose is to confirm that the board is powered.

Activity LED (Green)

The activity LED is for debug purpose. If you think there might be an issue with the hardware, you can unscrew the case and pull out the PCB to check the status of the LED located in the middle of the PCB labeled UP_LINK.

Color: Green
Function: HID uplink activity indicator

This LED reflects HID events being sent to the target computer through the USB HID bridge.

Behavior:

  • Blinking during use – Keyboard or mouse events are being transmitted successfully.
  • Idle (no blinking) – No HID events are currently being sent.

Internally, the LED toggles state every time a HID packet is successfully transmitted by the CH9329 chip to the target computer.

Typical usage behavior:

  • Moving the mouse rapidly will cause the LED to blink quickly.
  • Typing will cause intermittent blinking corresponding to key presses.

Troubleshooting

Video works but the green LED never blinks

This usually indicates that HID events are not reaching the CH9329 chip.

Possible causes include:

  • Bad USB cable (remote side)
  • WebSerial not functioning correctly in the browser (e.g. permission issues)
  • Missing USB to Serial driver on host computer (CH340 is not properly recognized as a Serial / UART device)

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