@teastain2 the v2.3.1 version does have a CP2104, but the label on this board is clearly a v2.3.2.
When I plug the cable straight into the board, Windows doesn't show anything - no COM port or anything else. Device manager doesn't blink at all. The board just powers on.
I'll try to get in contact with LilyGo later today...

I was planning on uploading a sketch fron the Arduino IDE but PlatformIO is also installed and ready to go.
And I'd be surprised if my supplier is mistaken.. I had email contact with them about the board and they specifically indicated this difference between the two versions, as I asked them because there's no information online.

@teastain2 I know the pain.. pretty stupid that they don't even list the product on their own page yet.
For reference the two requested pictures - but the eink display is glued fixed.
If you don't see anything obvious, I'll revert to mentioned GitHub & email, thank you!

@teastain2 thanks for your response.
LilyGo released an update of this board, which I got from here: https://www.tinytronics.nl/shop/en/development-boards/microcontroller-boards/with-wi-fi/lilygo-ttgo-t5-v2.3.2-esp32-with-2.13-inch-e-paper-e-ink-display
This version does require the T-U2T adapter to program the board. I tried the same BOOT & RST sequence, to no avail.

I currently do not have another TTGO board within reach to test the T-U2T adapter, but I am able to communicate with Heltec boards through USB-C on the same device & cable. Another U2T adapter I got in the same order did work when I tested it somewhere else (currently not within reach).

Hi guys, I am trying to flash a T5 v2.3.2 (with 2.13 inch e-ink display). This requires the use of the T-U2T adapter.
Using the Arduino IDE, I select the ESP32 Dev module as board, and the T-U2T port (listed as USB-SERIAL CH340K in Windows Device Manager).
Whatever I try, I do not seem to get any communication going. The serial monitor does not show anything when pressing RST button, and uploading always fails due to "No serial data received".
Holding he BOOT button on the U2T and pressing RST while holding BOOT does not help me extra. Tried two devices and two cables to no avail (while I had success using those cables and devices on other devices).

Any idea how to get this working? Cheers!