2719D, DP connection stopped working

Hello everyone!

I was recently away for 2 days and when I returned home, my Dell 27" 2719D monitor displayed this message:

"No DP signal from your device". I've had this issue when purchasing the monitor and the issue was resolved from the memory sticks not being attached properly. But this time all that has been done is turning the power off before traveling. Is it usual that DisplayPort cables stops working from no actual reason e.g no moving around etc.?