Question PC does not power up when two monitors connected

[woodendoors]

Hey there. I am having a strange problem, and I am clueless. I was using my pc with dual monitors one of them connected via DVI, the other one via HDMI. Currently, I switched HDMI one to DisplayPort. After then, my pc won't power up unless I unplug DisplayPort cable. After powering up, I can connect it again, and it works without a problem. I updated BIOS but had no luck. Any suggestions?

 

[rgd1101]

full system spec? include make and model of the psu

 

[woodendoors]

Hey, thank you for your reply. I figured out the problem. Turns out that my displayport cable is an old one and using pin 20. That pin causes such problems like mine. After using a VESA certified cable, my problem is solved.