I had two perfect LibreELEC rasperries for the last years running with Hyperion to mimic a ambient lighting system with LED strips attached.
Silly me didn't make a backup of the sd card (I think LibreELEC V9) before writing the newest LibreELEC V11.
Maybe I broke some wiring while removing and inserting the sd card so I followed the instructions on the wiki and rebuild all wiring for my two setups but it still doesn't work!!!
For now I just wasted hours and struck with a broken system! Please help me to get my ambilight working again! Thank you @all!