@Le_Ste
A reply to myself and for all user.
Solution exists: in RECALBOX partition, replace file recalbox-user-config.txt by version you can find here:
https://recalbox-public-assets.s3.fr-par.scw.cloud/recalbox-user-config.txt
I did it and reboot. it works like a charm!

Same for me.
upgrade on same card; not working Screen goes black.
From imager_1.7.4, I installed the Raspberry OS and had no pb to get something on the screen.
RecalBox re-installed, wizard creates 3 drives on my SD card, but still no luck.
Happy with anyone who can provide link to download previous Recolbox version.
Thanks