@teastain2 I seem to have a similar problem here. Mine seems to keep reconnecting and disconnecting though.

@alveron Sometimes...this depends on the sketch that is running and other Arduino environment conditions...you need to manually enter Upload Mode.
Press both Reset and Boot and release the reset first. You will lose the Arduino serial com and you need to re-select it.
Once you have a stable environment it may not require the sequence, just Upload!
You must select USB CDC On Boot: "Enabled" to get serial from your sketch to your computer.
ADC in ESP32 is very poor. I don't have a T7-S3 to test, just check the Diagram and other Internet sources. There will be data noise and poor accuracy.

Ask LilyGO Sales. They may sell you a replacement display.

T-Echo 'dismantling' video: https://www.youtube.com/watch?v=6yr7QQw5JGM

Finaly I find a solution.
My problem was probably an invalid application.
I have reinstalled hello_word program with a right bootloader, following pages :

https://docs.espressif.com/projects/esp-idf/en/latest/esp32s3/get-started/windows-setup.html

https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-guides/tools/idf-py.html

I type following commands :

idf.py set-target esp32s3 idf.py build cd build esptool.py -c esp32s3 -p COM3 --before=default_reset --after=hard_reset write_flash --flash_mode dio --flash_freq 80m --flash_size 2MB 0x0 bootloader\bootloader.bin 0x10000 hello_world.bin 0x8000 partition_table\partition-table.bin

@mendo2 Have you tried to force upload mode?

I mean press and hold left button, press Reset button on the side while keep hold left button. Wait 2 - 3 sec until computer recognize your device.
Then select Port in IDE and upload scetch.
(left button as looking from USB port perspective)

Hey,

found my Problem "stupid me" used Arduino IDE 2.0.2 not 2.0.3 xD
Also Updated the Lib for the Display now it´s working.

@tavdog I saw Mickey closed your issue in LilyGO T-Display S3 repository ?

This is confusing because swap bytes is much like reversing a film negative in that it should change radically with swap bytes true or false.

Did you checkout my LilyGO T-Display S3 repository ?

[edit] I just did this test of your image on my LilyGO T-Display S3 !IMG_5776 2.JPG
point is that blue came out blue and red is red!

solved: problem with my enviroment 😊 sorry
5.15.0-57-generic #63~20.04.1-Ubuntu <- VirtualBox 6.1(USB device forwarding) <- 5.4.0-135-generic #152~18.04.2-Ubuntu <- Arduino / PIO

Direct programming from host system - OK

Cheers!
Terry

I have received more TTGO with cases and they program fine. Looks like I got a defective unit.