Are referring to your GPU/display artifacting? If so, your port might not be broken/damaged. You might want to open up GPU-Z and see if there are any zero(0)'s showing up on the main window. Have you tried removing your display drivers and reinstalling them?
When posting a thread of troubleshooting nature, it's customary to include your full system's specs. Please list the specs to your build like so:
CPU:
CPU cooler:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS:
Monitor:
include the age of the PSU apart from it's make and model. BIOS version for your motherboard at this moment of time.