I downloaded and made a live usb with the newest iso, but after i check the usb to boot from and choose start kde neon it only shows a black screen and wont load.
checksum and everything is allright so download is not corrupt. tried it with two different usb sticks and used rufus.

does anybody have the same problem?

problem resolved.

my bios was at fault. just had to switch from uefi to legacy and then back to uefi again for whatever reason.