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Dual Monitor Issues

adowding63

New Member
I have just started having the following problem and wonder if anyone else is experiencing it.
I have 2 Samsung U28E590 4K monitors connected via DisplayPort to a Surface Dock. Previously I had both of them running at 3840 x 2160 however now I can only get one to do that and the other is stuck at 1920 x 1080.
Both use the same display cables, the dock is fully patched as is the Surface Book 2. Has anyone one else experienced this or have any suggestions to fix?
 
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