nvr4108-p-4ks2

greetings, recently purchased a dahua NVR4108-P-4KS2 and i am having an issue with live monitoring on the TV. connected to the NVR are two IPC-HDW4831EM-ASE and one 42212TNI. i can't view both IPC-HDW4831EM-ASE at the same time when they are set to 4K. they start alternating between one and...