Firebeetle ESP32 V4 cannot be seen by Windows

Hi all, apologies if this seems basic, but I can't can't get Windows to see my Firebeetle board.
I have a Firebeetle ESP32 V4 board that looks like one in this link.
After connecting the micro USB to the computer all I get is a flashing red CHG LED and a flashing blue L LED.
Is there something basic I'm missing here?
I have other ESP32/9266 boards here and have never had such issues.
Any guidance would be very much appreciated.
Thanks in advance,
Jim…..
The FireBeetle ESP32 uses the CH340 as the USB-TTL converter chip, can you confirm that you have installed the driver for this chip on your computer?
Windows: https://www.wch-ic.com/downloads/CH341SER_EXE.html
MacOS: https://www.wch-ic.com/downloads/CH341SER_MAC_ZIP.html
Linux: https://www.wch-ic.com/downloads/CH341SER_LINUX_ZIP.html
However, the CH340 driver is built-in in most modern Linux distributions, so if you have Linux and don't have a CH340 driver, it's more advisable to upgrade the Linux kernel rather than installing the driver manually.
