RG300 Firmware problem

[Maroi6]

Hey guys!
I got a RG300 and when i tried to update the retrofw everything went well until i startet the system. Only a black screen, i tried every firmware of retrofw 2.2, 2.1 and 2.0 only a few versions made my background light light up. (Mosty the 1A versions)
I tried the software from jutleys.wixsite too but not even the background lighting would turn in.
It says RG_300_1 20190928 next to the SD card.
The original boot logo said RETRO DEV KIT or something.
Can anyone help me with this problem ?
Thanks

[radiazo]

Try Y030 cl6 in a new, good quality sd