Install or update firmware directly from Chrome or Edge using Web Serial.
If you are not sure whether CH341SER drivers are installed, install them first to ensure a stable USB serial connection.
CH341SER package for Windows. Use this if the board does not appear correctly as a USB serial device.
Download for WindowsCH341SER package for macOS. Install it before attempting Web Serial flashing in Chrome or Edge.
Download for MacFor serial logs, click Full Install or Update, pick a port, then choose Logs & Console in the installer dialog.
Use this only when the display stays black after a normal firmware install. It helps verify whether the panel and low-level display pipeline are alive.
If the demo starts and you see graphics, the display path is alive and the issue is likely firmware configuration or state, not a dead panel.
If nothing appears even after waiting, check power, USB cable quality, and whether the board enters the correct boot/flash mode before concluding there is a hardware issue.
After a successful demo check, go back and run the normal Full Install again.