Seiki SK720T vinyl cutter typically uses a CH340 USB-to-Serial chipset
Install the CH340 Driver: Run the installer (often named CH341SER.EXE or similar). Click "Install" and wait for the confirmation message.
- Right-click speaker icon > Sounds > Playback tab.
- Right-click blank area > Show Disabled Devices.
- If "Seiki SK720T (NVIDIA High Definition Audio)" or similar appears, enable it and set as default.
- Alternatively, update your GPU’s HDMI audio driver (Realtek or NVIDIA/AMD).
- Right-click the Start Button and select Device Manager from the list.
- Look for the Monitors category and expand it by clicking the arrow.
