u/Domationality

So I just moved houses and set up my PC like usual, and at first my monitor was showing "no DP 1 signal detected", I checked my display port and it was broken, I went to buy another display port and when I plugged the display port in it just keeps crashing everytime I open my monitor, like 10 seconds after my monitor boots up it just crashes and says "no DP 1 signal detected" over and over and keeps restarting, can someone help?!