Help me

My ryzentosh with ryzen 5 3600 Asus tuf b450 plus and Radeon HD 7850 via dvi but have tried hdmi at first showed black screen after bunch of verbose code but I found out that putting it to sleep and waking it up fixes it but after I got macis Catalina installed what should be the macis setup screen is a blinking Flickering from black to grey after every 2-3 seconds and I have tried to put it to sleep but hasn't worked Please help me using latest version of opencore 0.7.3 or 0.7.2 I will not pay any money for the fix if u want money than don't comment I will report you