Third Monitor Display locked at 640x480

S

SFree2000

I am using a Dell Precision connected to a Dell WD19S docking station with three Dell P2417H monitors (two connected by DVI to DisplayPort; one connected by DVI to HDMI).I had this set up working for over 4 years, and randomly this week, the third monitor down graded and locked to 640x480.I cannot get the third monitor to get back to 1920 x 1080 as it used to be,Please note I do not have admin rights to change/update drivers.The third monitor swill now always lock and grey out at 640x480 resolution. I have attempted the following:Unplug the power to the monitor, wait a few minutes and plug it

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