S2716DG, horizontal banding, #3

The monitor was purchased about two years ago from a reseller, but I no longer have the original receipt.

Issue: S2716DG has persistent horizontal banding in the display. I've tried installing monitor drivers, performed factory reset, run BID and the problem persists. When I turn brightness and contrast above 75%, the banding is not visible on pure white backgrounds. See BID images below (for some reason rotated 180 degrees):

• PC model: homebuilt
• Operating system: Windows 10 Pro
• Video card specifications (video out ports): Geforce 1070 Ti with DP, HDMI and DVI out.
• Connections: PC GTX 1070 Ti DP out --> Dell DP cable --> S2716DG

This appears similar to previously-reported issues:
https://www.dell.com/community/Monitors/S2716DG-horizontal-line/m-p/7451149
https://www.dell.com/community/Monitors/S2716DG-white-horizontal-lines/m-p/7563228
https://www.dell.com/community/Monitors/S2716DG-horizontal-lines-during-BID/td-p/6152863
https://www.dell.com/community/Monitors/S2716DG-grey-horizontal-lines/td-p/7322909