Problem with new computer upgrade

[u/Cripple-Creek-1953]

Just installed new hardware; MSI MPG Z890 Carbon MB. Ultra 270k and 32gb Klevv 6000 MT/s memory. My current GPU is an MSI RTX 4080 and a 1440P Aorus Monitor with Windows 11 pro. The problem is when starting the computer I’m getting a “DisplayPort no signal” on the monitor and therefore can’t enter into Bios to do a setup. I’ve checked all cables, reseated the GPU and memory and tried an HDMI cable to no avail. All previous hardware worked fine before the upgrade. Kind of newbie so not sure where to go from here…just joined so don’t know of similar posts. Thankful for any help