Question LG 27GL650-B not displaying anything with DisplayPort cable ?

Isaac99

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Sep 29, 2014
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Hi there, built a pc for my friend, and his LG 27GL650-B monitor isn't displaying anything using a DisplayPort cable. The cable is plugged straight into the port of a GTX 1660 Ti.
It flashes a lighter black colour, then goes back to black, and repeats every 5-10 seconds.
Already tried unplugging and replugging and using different ports. The monitor works fine with an HDMI cable.
Any suggestions?