I checked stretch-image and downloaded it via Win32DiskImager to the RevPiConnect.

Nothing changed. No USB/LAN power.
And I saw only 1 Error on my screen when my system was booting:
...
[ FAILED ] Failed to start Load Kernel Modules
...
Any ideas?

Hi dirk,
thank you for your answer.

I received your e-mail, read it and made the next step.
I successfully downloaded and installed jessie.img with help of balenaEtcher program.
----------------------------------------------------------------------------------------------------------
Now I have the ...

Hi,
I have a problem with RevPi Connect.

One time the device did not turn on properly.
The power source may have been turned off at night.

Last boot - I got that my file system is only for read mode.
I decided to read log (dmesg command) -
[ 7801.739815] mmc0: fsm 1, hsts 1
...
[ 7801.750227 ...