Question Dell G3223d something weird....

[madican]

So i bought this Monitor dell g3223d, used for a while almost month. And i'm noticed weird issue, the Screen randomly flashes black, like itself turns off and return on, also if i shake monitor by holding legs it also happens too... My GPU is RTX 3070, Driver latest 546.17. Today i encountered this flashing black screen. Does this mean that monitor is defective? I'm worrying But before others monitors never happened this situation....
Cable connected with DP

 

[madican]

flickering i guess randomly....​

 

[punkncat]

Have you checked the power cable and video cable to make sure they are secure in their connectors?

Do you have another monitor to test with?

 

[madican]

Have you checked the power cable and video cable to make sure they are secure in their connectors?

Do you have another monitor to test with?

On this monitor power cable are normally connected. I think it's DP cable is somehow glitching... Maybe i should buy another DP cable then test out. But weird on my previous monitor HP 25x never happened before, and DP cable was ok, idk why in this monitor DP cable is not working correctly