Monitor has no signal after “update and shutdown” last night?

Pretty much what the title says, this is a brand new PC I got yesterday. Was working perfectly fine when I set it up, after doing a windows 11 “update and shutdown” the monitor stopped working. I have an Armoury Phantom prebuilt from Canada Computers, and an LG Ultra Gear monitor. I have tried unplugging and replugging everything in, I have very little experience with computers and I want to try to fix this myself before bringing it in for diagnostics? Any help appreciated, please let me know if I should elaborate.