pc doest display anything

My old pc was 5 years old i turned it on last week and i just didnt show any display it started fine apart from that my motherboard was giving a red vga light. I thought ok it must be the gpu. I bought a new gpu and at the same time a new case i rebuild my pc and i still have the same problem. i have my display port cable in my gpu not my motherboard. i know it isnt the screens/cable fault because i have 2 monitors and they both stopped working.

old specs: case: sharkoon case gpu: nvidia gtx 1660 cpu: amd ryzen 2600 ssd: lexar nm 790 moederbord: msi b450 gaming carbon ac ram: corsiar vengeance lpx 3200 mhz 2*8 psu: corsair vs650 power supply

upgraded specs case nzxt h5 flow 2024 gpu: nvidia rtx 4060 gpu: nvidia gtx 1660 cpu: amd ryzen 2600 ssd: lexar nm 790 moederbord: msi b450 gaming carbon ac ram: corsiar vengeance lpx 3200 mhz 2*8 psu: corsair vs650 power supply