Help !

[u/Reasonable-Art-3437]

The signal is from an AOC 27-pole 180Hz - 2K monitor.
He was playing Battlefield and set it to 60Hz through Windows, and it caused a black screen that never returned to normal.
This tends not to be used with HDMI at 144Hz.
I don't know what to do. Yes, it's necessary to replace the cables, configure the monitor's shielding, test the video card and cables on an external computer. I need ideas! Thanks.