Have you let your computer just sit there running for a few minutes? It might just need to memory train.
Do you get any error codes or beeps from the motherboard?
Does your CPU have onboard graphics you could try?
Make sure the monitor is on the correct input, even though they should auto switch it doesn't hurt to check.
I mean unfortunately denuvo has been pretty effective lately. It's not uncrackable but not a lot of effort is being put into it other than when Empress feels like it.
Only focusing on the knife thing. What else did you want them to do with it? xD
I thought I had cyberpunk on steam, couldn't find it so figured I must have pirated it when it launched. I downloaded it and was about to install it when a friend reminded me that gog existed and that was where I owned it.
If you can't hear anything does your motherboard have a display? Did it come with a little speaker? Look in your motherboards manual for the best way to get error signals.
Did you give your computer at least 5 min powered on though?