i have a black screen after changing refresh rate to 144hz
Welcome to ask.edora @snapak
Could you please give us more info’s as :
inxi -Fzx in terminal and post the output as </> Preformatted text here.
It is also a good idea when you start reading here > #start-here
I have to guess, because of missing info,s.
You might have a monitor who is not supporting 144hz.
Try while booting to press
Shift and select the rescue/low resolution mode to boot and then change the refresh rate back to the lower value.