Troubleshooting Controller v4.2

Hey Guys,
i just received my DIY BMS Controller v4.2 and cell board v4.4 for my DIY PW.

I started to flash the latest Test FW (2022-08-16-15-06) to the ESP32.
SD-Card ist mounted (FAT, 2GB) → not detected
TFT is mounted (U2 exists) → not detected
RX - TX connected
The blue LED is on, interrupted every 6s by a short blinking of the green LED.

Here a Screenshot from Putty. i2c adress seems to be ok.

You may have any idea what else can be checked to get the board running?

Best regards!