New STM32MP135F-DK: Error in setting up, no demonstration

[TSchi.4]

I've got the STM32MP135F-DK Discovery kit yesterday;

and am going stuck on setting up and using the contributed microSD. Demonstartions are not starting.

My Steps so far:

- STLink software is installed (WIndows10 pro).

- the supplied microSD ist installed in Discovery Kit

- Power is supplied to USB-C

- Boot switches are set as described in Table 5 of the UM,

 Boot from SD card on SDMMC1.  (pg.13, Table 5, Boot0: 1 / Boot1: 0 / Boot2: 1 )

What going on on Display: 

- Screen1: "ST live.augmented"; dark, then ..

- Screen2: left side "ST32 MP1" & Linux symbol ..

- then display is going dark, no more responses.

Reading the supplied microSD with Windows 10 only shows many empty drive letters.

(I did not format the µSD, as Windows ist suggesting)

My questions:

1. which demonstration should I see from the base demonstration?

(there are no examples at the UM)

2. what steps are required to start the demonstrations?

3. how is it possible to check the contents of the microSD?

4.what is the detailed link to download again the

  "STM32 MPU OpenSTLinux Distribution base demonstration software"?

5. which tools and steps are necessary to make a new µSD-card?

Many thanks in advance for your answers (tips, hints, links, whatever)

[TSchi.4]

Answer (to myself, and "to whom it may concern");

got help from ST "Online Support":

1)

 - Can you send a complete boot log?

 - Did you try to flash with the starter image from

   STM32MP1Starter - STM32MP1 OpenSTLinux Starter Package - STMicroelectronics

 - did you try to flash image using tsv

  from FlashLayout_sdcard_stm32mp135f-dk-optee.tsv

 - did you try on another DK135F discovery board?

2) can you try with the latest image from st.com

 STM32MP1Starter - STM32MP1 OpenSTLinux Starter Package - STMicroelectronics

 https://www.st.com/en/embedded-software/stm32mp1starter.html

  to flash using tsv with STM32CubeProgrammer, please find some information in attached document

3) very good information at

  https://wiki.st.com/stm32mpu/wiki/STM32MP13_Discovery_kits_-_Starter_Package#Image_flashing

4) regarding "weston-image"

   copy the image from

   https://wiki.st.com/stm32mpu/wiki/Wayland_Weston_overview#Display_some_images

   copy image on the board in /usr/local/rose-flower-blossom-bloom-39517.jpeg

   and change permission access

   chmod 777 /usr/local/rose-flower-blossom-bloom-39517.jpeg

  then on the board

   su -l weston

   cd /usr/local/

 then call    weston-image rose-flower-blossom-bloom-39517.jpeg